HC93190: IGES : WHEN IMPORTING A IGES FILE CONTAINING BSPLINE CURVES IN HIGH QUANTITY, THE PERFORMANCES ARE BAD

APAR status

• Closed as program error.

Error description

• DESCRIPTION:
  WHEN IMPORTING A IGES FILE CONTAINING BSPLINE CURVES IN HIGH
  QUANTITY, THE PERFORMANCES ARE BAD
  
  STEP BY STEP SCENARIO
  1. File+Open the iges file in V5R8+SP2
  2. It takes a bit of time, even in customer's Xeon box
     (in scale of minutes, not seconds ... )
  3. The resulting CATPart file size occupies 47M, when
  comparing with only 4M of the original iges file.
  4. The log file shows the followings
     entity type OK    KO    NS    OUT   DEG   INV
     110         1748  0     0     0     0     0
     126         28634 0     0     0     0     0
     100         804   0     0     0     0     0
     144         460   0     0     0     0     0
     RESULT      31646
  5. According to the 'explanation' of 36009/B432/C758, the
  iges file composes of many curve entities, and so after
  importing into V5, it occupies some space to describe it.
  6. As a control test, we import the same iges file into V4
  (V424R1).
  7. The resulting .model the size of which is LESS THAN 4M
  ...
  8. The IGECAT.out shows
  IGES ELEMENT                 ENCOUNTERED   NOT PROCESSEDSED
  100 Circular Arc             804           0
  102 Composite Curve          20            0
  108 Plane                    6             0
  110 Line                     1781          0
  116 Point                    19            0
  124 Transformation Matrix    816           0
  126 Rational B-Spline Curve  831           0
  128 Rational B-Spline Surf.  10            0
  142 Curve on a Parametric S. 10            0
  144 Trimmed Surface          10            0
  212 General Note             1             0
  402 Associativity Instance   135           0
  410 View                     6             0
  Total Number of Elements     4449          0
  .
  9. If V5 is said to be more superior than V4, why the former
  is just beaten by the latter in this SIMPLE test??
  10.MORE IMPORTANTLY, customer is not comparing the
  performance between V4 and V5. HE IS COMPARING CATIA with
  competitors (such as P/E, UG). With our 'fastest' Xeon box,
  CATIA V5 is just falling behind by the competitors on
     - V5 being 10 times running slower
     - V5 being 10 times MORE the file size it's generating in
  the resulting file
  

Local fix

Problem summary

•  INCIDENT DIAGNOSIS:
  WHEN IMPORTING AN IGES FILE CONTAINING BSPLINES IN HIGH QUANTITY
  THE PERFORMANCES ARE BAD.
  

Problem conclusion

• THIS PROBLEM WILL BE FIXED ON
    CATIA VERSION 5 RELEASE 10 GA level.
  
   TECHNICAL EXPLANATION FOR THE CORRECTION:
  The performance problem is now solved, the file is opened in
  less than 45 seconds (compared to 6 minutes before).
  About the size problem, please use the Topological Reduction
  option that reduces the size of the CATPart at the end.
  Please note that using this option, the time spent on the
  transfert is quite bigger.
  
   ANSWER AND POSSIBLE BY-PASS:
  No BYPASS.
  

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:

Modules/Macros

•    FILE
  

Fix information

• Fixed component name

  CATIA V5 NT_INT

• Fixed component ID

  569151000

Applicable component levels

• R508 PSN

     UP

• R509 PSN

     UP