HC95510: WIREFRAME & SURFACE : PROBLEM FOR CREATING AN OFFSET WITH A SWEEP SURFACE

APAR status

• Closed as Permanent restriction.

Error description

• Scenario:
  --------
  1) Open the provided catpart file
  2) Select the OFFSET icon and select sweep.1 as surface and
  give the value 100mm and both sides
  ==> Appears the Update error : "Offset surface operator :
  current offset value leads to a local degeneration on a
  surface : body cannot be built. Decrease offset value to
  avoid the degeneration or increase it to make the surface
  totally desappear
  .
  Expected result: the offset is executed
  .
  If the offset is executed with a value < 55mm is executed
  correctly in one side BUT not in both sides
  Wwhen the offset is < 55mm the offset is executed, but only
  in one direction (z>0) but not in the reverse direction.
  .
  

Local fix

Problem summary

•  INCIDENT DIAGNOSIS:
  Impossible to create an offset with a sweep surface.
  .
  

Problem conclusion

• THIS PROBLEM IS PERMANENT RESTRICTION IN CATIA
  .
   TECHNICAL EXPLANATION FOR THE RESTRICTION:
  The sweep surface control points is too close to each other in a
  small area at the middle of the surface causing an impossible
  offset computation, due to sweep inputs.
  .
   BY-PASS:
  Sweep result is better using 'deviation from guides' option
  with value 0.1
  .
  Sweep approximation then gives less control points and a better
  shape that can be offseted for values significantly greater than
  100.
  .
  

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