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IDProjectCategoryView StatusDate SubmittedLast Update
0031383Community[OCCT] OCCT:Data Exchangepublic2020-02-18 20:262020-11-23 21:18
Assigned Todpasukhi 
PlatformVisual Studio 2019OSWindows 10OS Version64 bit
Product Version[OCCT] 7.3.0 
Target VersionFixed in Version 
Summary0031383: Data Exchange - STEPCAFControl_Writer generates invalid curve in STEP file
DescriptionOCCT 7.4.0's STEPCAFControl_Writer is generating a STEP file that is unable to be opened by consumers, including OCC's STEP reader (appears to be due to a tiny curve with parametric step size < double precision). This is easily reproducible using the OCC CadAssistant application.
Steps To Reproduce1. Open HSK63AER40120M.STP in CadAssistant
2. Save as STEP model using default settings (HSK63AER40120M-output.step)
3. Close CadAssistant
4. Attempt to open HSK63AER40120M-output.step in CadAssistant

CadAssistant will hang indefinitely.
TagsNo tags attached.
Test case number
Attached Files? file icon HSK63AER40120M.STP (496,736 bytes) 2020-02-18 20:26

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- Issue History
Date Modified Username Field Change
2020-02-18 20:26 thomhong New Issue
2020-02-18 20:26 thomhong Assigned To => gka
2020-02-18 20:26 thomhong File Added: HSK63AER40120M.STP
2020-03-04 11:59 kgv Summary STEPCAFControl_Writer generates invalid curve in STEP file => Data Exchange - STEPCAFControl_Writer generates invalid curve in STEP file
2020-11-23 21:18 gka Assigned To gka => dpasukhi

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