| Issue ID | Summary | Product | Release |
| 6143 | crash opening files on nVidia Quadro FX with ForceWare version 91.36 | HOOPS/3dGS | 15.1 |
| 6133 | selection/deselection of antialiased text gives incorrect color results | HOOPS/3dGS | 15.1 |
| 6132 | PartViewer crashes when selecting on some text | HOOPS/3dGS | 15.1 |
| 6349 | HC_Insert_Shell Bug | HOOPS/3dGS | 15.1 |
| 6412 | Text selectability problem | HOOPS/3dGS | 15.1 |
| 6244 | nurbs curves rendered incorrectly | HOOPS/3dGS | 15.1 |
| 6762 | HC_Compute_Text_Extent causing a floating point exception (divide by zero) | HOOPS/3dGS | 15.1 |
| 6700 | spriting is broken | HOOPS/3dGS | 15.1 |
| 6611 | serious regression with clip regions | HOOPS/3dGS | 15.1 |
| 6594 | Show_User_Options returning spurious backquotes | HOOPS/3dGS | 15.1 |
| 6576 | Priority rendering does not work correctly when the antialiasing is used | HOOPS/3dGS | 15.1 |
| 6575 | Priority rendering does not work correctly for segments which do not have a common parent segment | HOOPS/3dGS | 15.1 |
| 6574 | priority rendering does not work correctly faces together with lines, texts and markers | HOOPS/3dGS | 15.1 |
| 6565 | Geometry being clipped by polygonal clip regions shows up at the edge of window clipped region | HOOPS/3dGS | 15.1 |
| 6558 | Bug In Compute_Selection_By_Polygon | HOOPS/3dGS | 15.1 |
| 6530 | Stack overflow selecting/highlighting a great number of elements | HOOPS/3dGS | 15.1 |
| 6525 | OpenGL graphics card support question | HOOPS/3dGS | 15.1 |
| 6512 | Color variation in displaying Graphics output | HOOPS/3dGS | 15.1 |
| 6498 | Crash in HC_Compute_Selection_By_Polylin when NURBS curve + Cutting plane present in scenegraph | HOOPS/3dGS | 15.1 |
| 6496 | crash when there is window background texture mapping | HOOPS/3dGS | 15.1 |
| 6466 | outlined TTF text disappears | HOOPS/3dGS | 15.1 |
| 6455 | Priority rendering doesn't work with TRANSFORM = ON | HOOPS/3dGS | 15.1 |
| 6443 | crash in HC_Compute_Selection_By_Polylin when "detail selection" Heuristics is ON. | HOOPS/3dGS | 15.1 |
| 6427 | HC_Edit_Line Display List Bug | HOOPS/3dGS | 15.1 |
| 6381 | Direct3d / cylinder memory usage issues. | HOOPS/3dGS | 15.1 |
| 6325 | failure drawing shell face holes | HOOPS/3dGS | 15.1 |
| 6310 | MSW Driver not redrawing scene | HOOPS/3dGS | 15.1 |
| 6251 | Window frames are drawn one pixel inside windows instead of outlining | HOOPS/3dGS | 15.1 |
| 6219 | Crash on quadro | HOOPS/3dGS | 15.1 |
| 6186 | Problems when 'lines' visibility on | HOOPS/3dGS | 15.1 |
| 6128 | attribute lock from style segment doesn't get applied | HOOPS/3dGS | 15.1 |
| 6118 | problem with vertex shading + display lists | HOOPS/3dGS | 15.1 |
| 6078 | Crash in Show_Existence and a question | HOOPS/3dGS | 15.1 |
| 6494 | Could not get the plane information from the Compute_Polygon_Plane | HOOPS/C# | 15.1 |
| 6489 | HoopsMVO introduces dependency on WinXP SP1 and Later | HOOPS/MVO | 15.1 |
| 6584 | HOpMarkupMeasure leaves trails | HOOPS/MVO | 15.1 |
| 6500 | HSelectionItem implementation problem | HOOPS/MVO | 15.1 |
| 6233 | TIF export causes "grayscale" error message | HOOPS/MVO | 15.1 |
| 6665 | DWG import problems | HOOPS/MVO | 15.1 |
| 6295 | axis triad causes polygon handedness warning | HOOPS/MVO | 15.1 |
| 6682 | BOpCodeHandler and Color_By_Value | HOOPS/Stream | 15.1 |
| 6545 | Hoopspartviewer - Screen not getting refreshed | HoopsPartViewer | 15.1 |
| 6359 | Hoopspartviewer crashes when opening the file | HoopsPartViewer | 15.1 |
| 6328 | Hoopspartviewer - The text created with Annotate operator disappears | HoopsPartViewer | 15.1 |
| 6308 | problem with annotation optimization | HoopsPartViewer | 15.1 |
| 6283 | Hoopspartviewer - shadow appears in hidden line mode | HoopsPartViewer | 15.1 |
| 6282 | Hoopspartviewer - "measure distance" operator not working with msw driver | HoopsPartViewer | 15.1 |
| 6408 | Parasolid Binary File could not be read by HP_Bridge | Parasolid | 15.1 |
| 6287 | Qthoopsrefapp4 - warning pops up at startup | QtPartViewer | 15.1 |
| 5839 | problems with HQWidget under OSX | QtPartViewer | 15.1 |