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aeroelastic optimization SYSTEM FATAL MESSAGE 3002 (DSFLTF)

aeroelastic optimization SYSTEM FATAL MESSAGE 3002 (DSFLTF)

aeroelastic optimization SYSTEM FATAL MESSAGE 3002 (DSFLTF)

(OP)
Hi,
greetings.

I'm doing aeroelastic optimization of composite structure using thickness of each lamina as design variable.
I have done optimization using aluminium and it worked, then I changed the material into composite by change the PSHELL properties into PCOMP and MAT1 into MAT8.

I can't get the optimization result, the optimization always stop at 3/5 cycle. Usually, in f06 file, after list of flutter summary there will be design optimization summary but it always stop at flutter summary and show this message:

*** SYSTEM FATAL MESSAGE 3002 (DSFLTF)
EOF ENCOUNTERED WHILE READING DATA BLOCK VDKU (FILE 101) IN SUBROUTINE DSFLTF
0FATAL ERROR
1 * * * END OF JOB * * *


No Symbolic Replacement variables or values were specified.

*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 101 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 102 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 107 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 104 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 106 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 201 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 108 WAS LEFT OPEN AT PROGRAM TERMINATION.
*** SYSTEM INFORMATION MESSAGE 1156 (XCLNUP)
GINO FILE 109 WAS LEFT OPEN AT PROGRAM TERMINATION.


I've searched in google but can't find anything. please help me.
I appreciate every suggestion, critic, or response. thank you in advance

-martina.

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