HD32955: STEP / SURFACE IS LOST AFTER STEP CONVERSION.

APAR status

• Closed as Permanent restriction.

Error description

• STEP / SURFACE IS LOST AFTER STEP
  CONVERSION.
  .
  

Local fix

Problem summary

• STEP / SURFACE IS LOST AFTER STEP CONVERSION.
  STEP / SURFACE IS LOST AFTER STEP
  CONVERSION.
  .
  

Problem conclusion

• THIS PROBLEM IS PERMANENT
  RESTRICTION IN CATIA.
  .
  Incident Diagnosis:
  Step face import fails in optimized mode
  producing 463x4=1852 CATSurface (!) but is
  correctly imported with non-optimised mode
  producing 561x4=2244 CATSurface (!!!)
  .
  Restriction Explanation:
  The C2 cutting provides a huge set of
  CATSurface in both modes
  (optim/nonoptim).
  But, in optim mode, the CATPCurve
  representation of the boundary of the face
  present lots of holes between CATPCurves.
  See attached jpg file
  Detail_MF40781_KO_optim.jpg showing one,
  AMONG DOZENS, of such incorrect gaps
  between edges and/or between CATPCurve
  inside an edge.
  (N.B. : text are not meaninfull in this
  purpose. Only image is meaningfull).
  On such poor quality models, we use some
  heuristics in order to restore a probable
  connexity between CATPCurves.
  Given the huge number of holes, these
  heuristics fail when trying to discard
  CATPCurve and/or retrieve which of them
  are good ones or not.
  .
  The quality of CATPCurve is much more
  better in NON-optimized mode than in
  optimized, which is quite strange.
  .
  We tried to modify internal CATPCurve
  reconcialiation heuristics but without
  success, even many (and costly) trials.
  .
  Low quality of CATPCurve representation
  (STEP file given or laydowned) multiplied by
  huge CATSurface number, also revealing a
  low surfacic quality, seem to be responsible
  of the KO.
  .
  By-Pass:
  Use non-optimized mode instead of
  optimized mode.
  .
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels