View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0027069 | Community | OCCT:Data Exchange | public | 2016-01-09 21:33 | 2023-08-01 15:08 |
| Reporter | Roman Lygin | Assigned To | |||
| Priority | normal | Severity | minor | ||
| Status | new | Resolution | open | ||
| Product Version | 6.9.1 | ||||
| Target Version | Unscheduled | ||||
| Summary | 0027069: IGES parser does not recognize comments in Parameters section | ||||
| Description | The IGES parser is not able to recognize comments which are allowed by the IGES spec, issues false positive warnings, and populates IGES model with invalid data. As a result the IGES file cannot be converted afterwards. This is a root-cause of issues reported at www.opencascade.org/org/forum/thread_26716/?forum=3. See also attached a simpler reproducer. Excerpt from IGES spec 5.3: "2.2.4.5.3 Any desired comment may be added after the record delimiter. Additional comment lines may be used by keeping the same Directory Entry pointer in Columns 65-72 and including the comment lines in the entity’s parameter line count (DE Field 14)." | ||||
| Steps To Reproduce | igesbrep points-with-comments.igs data c # must be no warnings/errors | ||||
| Additional information and documentation updates | Preliminary analysis shows that the IGES parser does not attempt to associate P section entries to D section entities using references from D to P. Instead it uses a consecutive list of parameters from the P section and just incrementally associates them to D entities. When the parser encounters a multi-line comment or a comment taking a new line in the P section it mistakenly interprets it as a string parameter what breaks this incremental association and thus further parsing. No fix currently available. | ||||
| Tags | No tags attached. | ||||
| Test case number | bugs xde bug27069 | ||||
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points-with-comments.igs (1,394 bytes) |
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Problem described in issue is reproduced on current state of OCCT. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2016-01-09 21:33 | Roman Lygin | New Issue | |
| 2016-01-09 21:33 | Roman Lygin | Assigned To | => gka |
| 2016-01-09 21:33 | Roman Lygin | File Added: points-with-comments.igs | |
| 2016-10-26 11:54 |
|
Target Version | 7.1.0 => 7.2.0 |
| 2017-07-27 09:24 |
|
Target Version | 7.2.0 => 7.4.0 |
| 2017-08-17 14:36 |
|
Test case number | => bugs xde bug27069 |
| 2017-08-17 14:36 |
|
Note Added: 0069523 | |
| 2019-09-04 13:04 |
|
Target Version | 7.4.0 => 7.5.0 |
| 2020-09-11 18:46 |
|
Target Version | 7.5.0 => 7.6.0 |
| 2021-10-18 14:02 | kgv | Target Version | 7.6.0 => 7.7.0 |
| 2022-10-24 10:39 | szy | Target Version | 7.7.0 => 7.8.0 |
| 2023-08-01 15:08 | dpasukhi | Target Version | 7.8.0 => Unscheduled |
