Corrected Bugs

Total corrected bugs : 537

Application Framework , 29 corrected bugs
ID
Summary
5 Dependent objects are not editable after freeze if they have dependent children.
6 Move operation failed for some objects with dependants.
73 It is impossible to change the selection mode of displaying object through the class TPrsStd_AISPresentation.
148 Impossible to reuse memory by AIS_InteractiveContext. .
149 Impossible to reuse memory by TNaming_Builder.
158 Impossible to save a standard OCAF document on DEC.
159 TDocStd_Owner attribute has a pointer to a closed TDocStd_Document.
187 PColgp_HArray1 allocation crash.
261 Clear "redos" functionality.
267 The status of OCAF document saving process is always successfull.
273 Crash when a hinge is introduced between Landing1 and Anti-Roll1 shapes.
282 Shape type is neglected by Naming.
342 Invalid pointer realese.
350 Lateral face of parted prism bad naming.
351 Lateral face of prism at the face of box bad naming.
352 Solid selection bad naming.
355 Prism at the cylinder face bad naming.
361 It is impossible to replace a shape with another orientation in the TNaming_NamedShape attribute.
373 "Problem in CVS compiler. Problem of distinguishing between an enumeration defi ed as BRepBuilderAPI_Transform BRepBuilderAPI_TransitionMode.hxx class and B epBuilderAPI_Transform class. It regenates a clash in CVS compiler".
381 Improvement made by SAMTECH contribution.
387 TDataStd_Relation attribute is out of transaction mechanism.
414 Crash on NT during document saving.
425 Exception on attemp to save a document that contains empty TDataStd_Name.
644 TDataStd_Relation attribute has bad transaction algorithm.
669 Standard_GUID("HoleFeature") cause stack overwrite.
674 Naming failed at the 5th gluing operation.
738 The GUIDs in XCAFDoc have incorrect format.
739 Invalid GUIDs in DDataStd_DrawPresentation and DDataStd_Sample.
925 Wrong behaviour of TDataStd_IntegerArray in Undo / Redo .
 
Data Exchange ,82 corrected bugs
ID
Summary
1 Shape healing functiion FixFaceSize 'DT_ApplySeq' is out of order.
2 Standart output of Draw's STATSHAPE command is incorrect.
18 Lose edges after sewing.
29 Crash during try to load STEP file with a sample C31 on NT.
34 Invalid result of working FixMeassingSeam.
46 Rational bezier surfaces are not correctly exchanged with STEP.
48 Canonical recognition.
56 The following sequence "ElementaryToRevolution" (operator of ShapeProcess_operLibrary) has no effect !
58 Shape is incorrect after translation.
89 Reading of this file crashes.
90 Exception when translating an IGES file to Open CASCADE (mapping phase).
91 Exception when translating an IGES file to Open CASCADE (loading phase).
92 Many untrimmed faces resulting from translating an IGES file to Open CASCADE.
93 Exception when translating an IGES file to Open CASCADE (loading phase).
94 Exception when translating an IGES file to Open CASCADE (loading phase).
95 Exception when translating a STEP file to Open CASCADE (shapehealing phase)
96 Exception when translating a STEP file to Open CASCADE (loading phase).
97 Exception when translating a STEP file to Open CASCADE (loading phase).
98 STEP file cannot be translated to Open CASCADE.
99 IGES file cannot be translated to Open CASCADE.
111 Bad conversion of Conic Arc from IGES. It is necessary to make patch only for C40.
125 Exception when ShapeFix_Shell class is used.
127 Wrong result in case of multiconnexity (ShapeFix_Shell class).
133 Bugs on reading IGES and STEP files.
156 Crash when you want to import the "waaier_para.igs" file .
167 Problem in reading step file (surf.step).
168 Fix missing seam don't add seam.
169 Fix Add PCurves create wrong pcurve.
171 Exception in ShapeFix_Shell during translation file bm2_id_t4-A.stp.
180 Uncorrect work of FixMissingSeam.
184 Bad IGES/BREP translation.
201 Incorect face (with wrong boundary) is imported from IGES file.
205 MITUTOYO's Patch to be converted from OccV3.1 to OccV4.0.
219 Reading STEP file is failing?
222 Regression (bad tolerance after fixshape).
233 Exception during translation in dev in optimaze mode (debug mode - OK).
272 Problem of translaton STEP and IGES files.
279 Uncorrect work of FixOrientation in ShapeFix_Face.
283 Incorrect translation two faces.
306 Wrong shading on a surface after sewing.
314 Tolerance was increased after writing to IGES and reading after that.
319 Wrong shading on a shape.
320 Exception while union face operation in Canonic Recognition.
321 Crash during importation of IGES file on SUN, on other platforms message "Syntax error during importation".
322 Internal vertices of faces disappear after sewing.
326 Exception is raised in sewing on internal edges.
348 Crash on importing STEP file.
365 Problems of step and iges file reading.
386 Crash when reading an IGES file.
393 Bad shading after Shape Fix.
394 After operation "Merge edges" tolerance shape increased from 5 to 198.
445 ShapeFix_Shape can not correct the negative volume of the solid.
448 Wrong translation IGES file in "Only visible" mode.
450 Surface of Revolution translated as plane.
470 Command fixshape does not fix attached shape.
495 Wrong ShapeFix
514 There seems to be a bug in the IGES-reader:
499 Missing method in ShapeFix_Shape.
532 Regressions.
533 XmlOcaf-Document is not stored in XDEDRAWEXE although stored in TCAF.
546 Invalid shape locations after reading dxf file in DRAW.
547 Big tolerance after sewing and commmand fixshape on attached file.
609 Impossible to write separate vertices to STEP.
630 DRAW hangs up at the attempt to restore solid previously saved in STEP format .
659 Units are not taken into account while translating IGES surfaces.
700 Regression reading IGES.
706 An IGES file couldn't be read.
714 After command sew in DRAW on attached shape free wires are disappeared.
725 Storing all free vertices of STEP into one SHAPE_DEFINITION_REPRESENTATION.
810 Xalloc in optimise mode.
816 Fail in xloop iges file in brep mode.
859 Attached shape is not sewed.
861 Invalid free boundary resulting from command DRAW "freebound" on the attached shape.
901 ShapeFix_Wire::FixSelfIntersection does not remove all loops.
908 Regression.
926 Attached file can not be read.
945 Regression in dev on ie_exhaust-A.stp
950 No implementation of some methods in ShapeAnalysis_CheckSmallFace
953 Adding flags to class ShapeFix_Wireframe.
966 Regression.
991 Command "exit" is out of order for XDEDRAWEXE and XSDRAWEXE.
1055 Exception is raised during mesh preparation for the shading mode representation.
 
Foundation Classes, 15 corrected bugs
ID
Summary
39 Imposible to read files saved with the previous version OCC.
45 Translation of edge without 3D curve is incorrect.
63 It's impossible to open files containing localisation characters in the name.
121 Exception while reading shapes using FSD_Archive class.
142 SEGV occures in PCollection_HAsciiString::Clear().
181 Resource_Manager class doen't return status of saving resources in a file.
216 Empty string initialized PCollection_HExtendedString class doesn't work correctly.
255 AIS_LocalContext.cxx problem.
309 bug in OSD_Path::UpTrek.
310 another bug in OSD_Path::UpTrek.
383 Improvement made by SAMTECH contribution.
385 Improvement made by SAMTECH contribution.
392 Improvement made by SAMTECH contribution.
440 warning in Standard_Real.hxx.
710 Little modification in OSD_FileNode::Exists().
 
Modeling Algorithms , 236 corrected bugs
ID
Summary
23 Checkshape says that the wire on face has bad orientation but it is not so.
25 Checkshape says that the wire on face has bad orientation but it is not truth.
41 Isos lines are drawn incorrectly.
53 Segmentation violation detected during Fuse operation.
59 Bad result of fuse of shapes in the file attached.
62 Impossibility to fuse solids in the file attached.
67 Crash on attempt to put a fillet onto crank.brep.
68 It's impossible to fuse the sphere and the prism in the file attached.
77 The BRepFill_Pipe fails.
78 Pipe is created incorrectly on two wires.
80 The command "section" in Draw gives exception "attempt to access to null object".
81 Section shell by plane gives overlapped edges.
82 Incomplete section of shell by plane.
83 Section of simple BSpline surfaces is performed too slow.
86 Wrong result of BRepOffsetAPI_ThruSections.
88 Can not project vertex to face.
100 Draw is crashed during cut on Windows NT.
101 After restore operation section result is incomplete.
102 Fuse operation of attached shapes fails.
107 Extrema_ExtCS returns wrong U V parameters.
108 BRepTools::AddUVBounds for the planar face bounded by a circle returns an extremely small bounding box.
109 Visualisation of the attached shape is incorrect in the shading mode.
110 Wrong result of topological operations (Cut and feature).
116 Creation of chamfer is impossible on an attached shape.
117 It's impossible to fuse the two shapes in the compound attached.
118 The Cone part of final fuse shape becomes invisible.
119 Application hangs doring the try to put fillet on some edge.
122 Cut and fuse operation is impossible on attached shape.
123 Boolean operation fuse on Sphere and Box is impossible.
139 Intersection curve is wrong.
143 Command length give exeption on offset line.
144 Section is incomplete.
145 Memory leak in BRepBuilderAPI_MakeFace.
147 Shading on DEC is bad.
161 BRepCheck says 'OK' on face with inverted wire.
174 Unsatisfactory analyze given face in BRepCheck.
178 Regression of boolean operation.
179 Bug in meshing of the enclosed face (SK25.brep.)
202 In math_NewtonFunctionRoot status Done is not initialized befor Perform.
212 Bug in Topological "Common" boolean operation.
213 Bug in Topological "fuse" boolean operation.
221 Uncorrect work of BRepCheck.
226 Nurbsconvert crash in ProjLib_ComputeApproxOnPolarSurface.
231 Uncorrect work DRAW command "proj" in version dev.
234 Uncorrect work of checkbrep.
235 Incorrect intersection of two surfaces.
251 Incorrect result of section.
253 Exception while segment operation on periodic BSpline curve.
260 No project parabola curve on plane in some cases.
262 Bad quality in builing 3dcurve from 2d one and surface.
263 Incorrect mesh on shape.
264 No mesh on the shape.
265 Exception while projecting hyperbola on plane.
269 Wrong mesh on faces.
271 Wrong intersection of two surfaces with additional information.
275 Lack of method "Perform(me: in out; P: Pnt from gp)" in the class GeomAPI_ProjectPointOnCurve.
276 Bad performance of checkshape on faces with multiple wires.
284 Command "checkshape" "gives" exception during attempt to check attached shape.
285 Problem of re-opening a saved OCAF file.
287 Created meshes for shading (file BRepMesh_FastDiscret.cxx) for some faces are wrong. These faces are incorrectly shaded or missing in 3D viewer.
291 Some triangles of shading mesh are outside shape boundaries.
292 Attached face looks as unclosed but command "checkshape" concludes that it is valid. Inspite of that mesh for shading is not creating on this face.
293 Chamfer ending at the fillet in impossible.
295 Exception is raised in the GeomConvert_CompCurveToBSplineCurve.
297 Bug in BRepPrimAPI_MakeHalfSpace / BRepAlgoAPI_Cut classes.
298 Exception during "tcopy" command.
299 The 3D-point can not be classified by the solid.
300 Compsolids have no volume.
302 Uncorrect work of checkbrep.
303 Exception while segment operation.
304 Bug in Geom2dAPI_Interpolate.cxx.
305 BRepOffsetAPI_MakeOffset: problem with offsetting a wire.
307 It is impossible to make Glue on the attached Shape.
308 Can not project 3D-curve on surface.
311 Hung up and incorrect result in Segment (2d and 3d).
312 Bug in Extrema_ExtPElS.
315 Wrong result of cut two faces (cut r f1 f2).
317 A Solid "so" is valid whereas wire "so_5" from the solid is not valid.
318 Checkshape works wrong with Semi-Infinite Prism (s).
323 Exception in section between faces when face has internal edge.
324 Can not intersect plane and cylinder.Infinite loop or bad performance.
325 Checkshape does not recognize an error in a bad face.
327 Wrong checkbrep status
332 Invalid wires generated by BRepOffsetAPI_MakePipeShell.
333 Superimposed curves during intersection two surface.
334 Impossibility to cut a shell by a solid in the file attached.
335 It's impossible to make boolean operations (common) for the two solids in the file attached.
336 It's impossible to fuse two solids in the file attached.
337 It's impossible to fuse two solids in the file attached.
338 Incorrect result of fusing a box to the cylinder in the attached file.
339 The attached files could be read on SUN but not on PC.
340 Revolution Algo produces invalid resulting Shape.
341 Algorithm of BRepPrimAPI_MakePrism produces a NOT VALID result.
343 Unstable work of BRepTools_Quilt.
345 Function BRep_Lib::SameParameter hangs on edge.
347 Visualization problem.
353 Hangup in Geom2dGcc_Circ2d3Tan.
356 The Draw command "wexplo" gives one edge instead of 6 for the face.
357 Bug in BRepOffsetAPI_MakePipeShell.
359 Extrema between trimmed line and circle lead to exception. It takes patch only for C4.0.
360 Can not find a projection the circle on the sphere. It takes fix only for C4.0.
362 Command wzoom in Draw works incorrectly.
363 Incorrect work of persistence during reading and writing of degenerated edges. It is necessary to fix problem only for C40.
370 Intersection between a sphere and trimmed plane using IntPatch_Intersection lead to infinite cycle.
372 BRepClass3d_SolidClassifier classify point to solid as OUT but the point is inside the solid.
375 Misprint in IntWalk_PWalking_1.gxx.
382 Improvement made by SAMTECH contribution.
391 Improvement made by SAMTECH contribution.
395 Invalid result after GeomConvert_CompCurveToBSplineCurve.
397 One face from IGES in not shaded.
399 Checkshape gives wrong result for valid face "f".
400 Wrong triangulation of faces.
405 Exception is raised in the GeomConvert_CompCurveToBSplineCurve.
406 Checkshape says face is Ok but it looks invalid.
407 Fuse and cut results are bad. REGRESS on cases 1cto/014/K2/K4.Linux.
408 Common of two boxes is shell. Regress on case 1cto/021/O1.
409 Common of two shell is not closed shell.Regress on case 1cto/022/A1.
410 Exception on cases 1cto/022/B1.
411 Bad result on case 1cto/022/D2. Regress.
412 Bad result on case /1cto/022/G3.Regress.
413 Bad result on cases 1cto/022/K1 Regress.
415 Draw crashes on case 2cto/900/C1.Regress Linux.
416 Bad result on case 2cto/900/P6.Regress exept NT.
417 Bad result on case /2cto/900/Q3.Regress.
418 Bad result of cut on case 2cto/904/A6 and fuse on case 2cto/904/F3. Regress Linux
419 Bad result of cut on case 2cto/904/C8. Regress.
420 Bad result of cut on case /2cto/909/F4.
421 Bad result on case cda/001/G4. Regress Linux.
422 Bad result on case cda/002/D4 and cda/003/C4. Regress Linux.
423 Bad result on cases cfe/004/F2 and cfe/007/E5. Regress.
424 Draw hangs up on cases cfe/003/F3 and cfe/003/F5.
426 The result of fuse operation is invalid.
427 Cases che/001/E1 .
428 Exception during vizualization on attached shape in the application.
429 Projection of a point on a surface works incorrectly.
430 Exception when projecting a point on surface of linear extrusion.
431 Intersection of two surfaces is not compleate curve.
434 Exception is raised on NT SUN in the GeomConvert_CompCurveToBSplineCurve.
438 Attempt to check shape which was attached to OCC428 by command "checkbrep" leads to exception.
439 Cut operation produces a NOT Valid result on attached shapes.
442 Exception during call of BRepAlgoAPI::IsValid method on attached shape.
444 Exception in '2dextrema' command.
446 When BRepTools_WireExplorer is used in checkshape function, it does not give all edges of a wire.
447 BRepTools_WireExplorer while function checkshape gives not all edges of wire.
449 Invalid cut result.
452 Loop on some cases in cto grids.
453 Loop on some cases in cfi grid.
454 Wrong classification a 3D-point by a Solid.
465 Wrong Reader for BRep models..
471 Not Valid result after Cut (or Common) operation.
472 Bad result of Fuse Operation (Cut&Common - bad too).
477 Return type of GeomPlate_CurveConstraint::NbPoints() is wrong.
478 3 methods missing in GeomPlate_PointConstraint.
481 Incmesh does not works on the attrached shape.
483 Bad result of fuse two solids.
485 Draw hangs up during performing fuse operation.
486 Extrema_ExtPS gives wrong solution.
487 Regression.
490 Result of fuse operation is faulty shape although arguments are valid.
491 Result of fuse operation is faulty shape although arguments are valid.
492 Exception occurs during fuse operation.
498 Wrong 3d point from offset surface by parameters.
500 Result of pipe command of Draw is faulty.
501 Exception during tcopy command (only in 3.0fix).
502 Samtech contribution.
503 Draw hangs up during sprops operation.
504 AllocMemory while intersection command.
505 BRepExtrema_DistShapeShape throws an exception.
507 Problem in BRepBndLib::AddClose method.
512 Faulty shape is result of BRepAlgoAPI_Cut function during loading e3i-file in pkv-GalleryTest workbench.
513 Can not intersect plane and conical surfaces.
516 Wrong classification of the 3D-point with the Solid .
518 Checkshape reports problem.
527 BRepAlgoAPI_Section creates very distant geometry on some planar sections.
530 Draw hungs up during performing bfuse operation.
531 Can not intersect a plane and a cone .
534 Too big log in grids.
535 Command "fixshape" in DRAW increase quantity of shapes on attached shape.
537 Bus error applicaton while intersection operation.
539 Regressions.
541 Extrema works wrong for line and circle laying on one plane.
566 BRepBndLib::AddClose builds box larger than BRepBndLib::Add
570 Multiple fillets with variable radius are not built.
571 Fillet operation fails on given shape.
578 Bug in BRepClass3d_SolidClassifier.
582 Checkshape result is wrong.
602 Exception during filet creation if it cross samedge of cylinder.
606 GeomFill_NSections crashes with fatal exception.
613 Meshing algo cannot create mesh for faces with internal edges.
618 Exception during bop.
636 BRepOffsetAPI_MakePipeShell builds twisted pipe.
637 BRepOffsetAPI_MakePipeShell crashes with fatal exception.
651 Incorrect boolean result.
652 Incorrect cut result.
673 Exception is raised during splitting face by a wire laying on the face boundary.
697 Fuse operation does not work.
702 No possibility to make a prism.
703 Wrong result of extrema.
705 Incorrect computation of the matrix of inertia.
712 Exeption is raised in DRAW during bulding draft with help command "depouille."
736 Incorrect work of BRepCheck.
743 Wrong result of offsetting a wire.
755 Incorrect type of cut result.
758 Cut operation fails.
767 Operation SameParameter hung up.
767 Operation SameParameter hung up.
770 Impossible to fuse 3 attached shapes.
771 Impossible to fuse 3 attached shapes.
775 Impossible to fuse two attached shapes.
778 Incorrect result of cut of the cylinder from the shape.
779 Common operation produces invalid shape.
783 Bug using new Boolean Operation.
788 ThruSection cannot determine the correspondence between wires correctly .
789 ThruSection algorithm produces an oscillating surface.
809 Misprint in IntPatch_IntersectionGen.gxx.
813 Geom2dGcc_Lin2d2Tan fails on point and ellipse.
814 Geom2dGcc_Lin2d2Tan fails on circle and ellipse..
822 BRepMesh_IncrementalMesh fails on some faces
823 BRepAlgoAPI_Fuse fails on two cylinders..
824 BRepAlgoAPI_Fuse fails on cylinder and sphere
825 BRepAlgoAPI_Cut fails on sphere and b-spline face.
826 BRepAlgoAPI_Fuse fails on revolved and sphere.
827 BRepAlgoAPI_Fuse fails on cylinder and torus.
828 BRepFilletAPI_MakeFillet fails on prism.
829 BRepOffsetAPI_MakeOffset fails on given wires .
831 Regression.
867 BUG in GeomAPI_ProjectPointOnSurf.
889 wrong checkshape on shape from voletg.dxf (entity 25).
895 BRepOffsetAPI_ThruSections creates a twisted surface.
909 BRepTools_WireExplorer gives a different number of edges in dev and FIXOCC40.
910 The problem with sat files depends on the problem of BRepTools_WireExplorer.
946 It is impossible to launch Draw if CASROOT has several backslashes.
951 BRepAlgoAPI_Section and BRepAlgoAPI_Common fail on given shapes.
957 Draw function PSPHERE creates an incorrect shape (according to CHECKSHAPE function.)
964 Different behaviour for ROS and ROSDEB during CUT operation in CTO/908/A8 case.
1013 BRepBuilderAPI_MakeFace creates an invalid face on a planar wire.
 
Modeling Data , 80 corrected bugs
ID
Summary
3 Fuse : lost of some faces of the fused parts.
4 Impossible to put a fillet on the attached brep following the attached pictur .
7 Extrema_ExtPElS throw the exception "gp_VectorWithNullMagnitude".
8 BRepTools_WireExplorere gives not all edges from a wire.
11 Improvement of DRAW on WNT.
12 Extrema point-surface gives incorrect result.
13 It is impossible to intersect two surfaces.
15 There are some problems with visualisation in shading mode.
16 Face wich is built on the torus surface with equals radii is not visible in shading mode.
17 One face is not visible in the shading mode.
20 Face apearence in shading mode is wrong.
26 Bad results of fusion of solids.
27 Acceptable Chamfer impossible to create.
28 Fuse result of the two parts is incorrect.
30 Crash when you ask to make a chamfer on a spher.
31 Bad shape produced by Algo of BRepFilletAPI_MakeChamfer (TKFillet).
35 Checkshape skips bad shape from CTO tests.
37 The result of the fuse of the two solid is incorrect.
42 BRepAlgo_Sewing does not sew attached shape with any tolerance.
50 BRepFilletAPI_MakeFillet presents a bug on fillet computation (build()).
54 Exception is raised during command "small" in DRAW on attached shape.
57 Incorrect result of fuse of two solids in the file attached.
65 Possibility to make a revolution to have a solid with a volume=0 m3.
66 It's impossible to cut sphinks.brep with box.brep.
75 Incorrect work of section Shell-Shell.
103 Exception is raised when we try to make 3d curve from a 2d offset curve.
104 Incorrect computation of volumes.
105 Unstable work GeomFill_Pipe with specified guide.
106 Can not intersect two unlimited surfaces (takes a very long time).
126 BRepTools_WireExplorer can't walk along a wire.
130 Draw Environment: No intersection found between a specific surface and a line.
134 Face is impossible to extrude.
135 CRASH at attempt to sew the EXOTOUR_poly.brep.
141 Run tim eexception whiole segment operation.
150 Crash with all memory exhausted at attempt to fuse two solids in the file attached.
151 Fuse : lost of some faces of the fused parts.
152 Bad result after a cut operation on the shape.
157 Class BRepLib_FindSurface can not find plane for specified wire with tolerance 100mm.
160 Impossible to perfom the cut fuse and common operations on attached shapes.
162 Memory leakage during sewing operation.
163 The result of extrema command is not correct.
164 Impossible to fuse all solids attached.
165 Bug regression in BRepOffsetAPI_MakeOffset class (offsetting in OY direction).
175 Bug of a symmetry on this specific attached BREP shape.
183 Regression.
188 Regression.
203 Broken Shape on Fillet and Chamfer creation.
207 Missing faces after BRepAlgoAPI_Fuse.
211 Error of fillet prolongation.
217 nurbsconvert problem.
227 Fuse error.
228 Impossible to make common of the two shapes.
252 Wrong limit result.
254 Common of the shells is impossible.
256 Wrong shading on a face.
257 Incorrect bounding box of a sphere.
258 Incorrect shading.
259 Different behaviour of checktopshape on SunOS and IRIX.
268 Using of command "lprops" for shapes that contain degenerated edges call exception. (Sample of such shape is attached).
274 Limitation operation doesn't work for the shape.
278 Command "checkshape" does not define self-crossing for some wires and assigns status "valid" for them (See attached shapes).
313 Shape from brep file can not be restore with help command "restore" in DRAW.
366 Checkshape says that face is valid but it inludes selfintersecting wire.
367 GCPnts_UniformAbscissa returns incorrect results.
368 Visualization is too slow.
369 BndLib_Add3dCurve raised an exception on edges which range is out of the domain of the curve.
371 Intersection between two BSplineSurfaces using IntPatch_Intersection lead to infinite cycle.
374 Offset surface from bspline surface is not correct.
376 Offset can not be created on the attached surface.
377 Incorrect behaviour of BRepTopAdapter_FClass2d. It is necessary to fix problem only for KAS:dev.
379 Exception cannot be catched when the first user command in Draw is an empty string.
380 Incorrect result of common operation.
390 Improvement made by SAMTECH contribution.
432 Regression: exception during checkbrep.
466 BRepBuilderAPI_NurbsConvert crashed for a part imported from IGES.
469 Fusing impossible.
536 Impossible to fuse the shapes.