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Trim Condition with SOL144 USER. FATAL MESSAGE 9133 (AESTATRS)

Trim Condition with SOL144 USER. FATAL MESSAGE 9133 (AESTATRS)

Trim Condition with SOL144 USER. FATAL MESSAGE 9133 (AESTATRS)

(OP)
Hello Everyone,

I'm Domenico Pezzella. I'm dealing with my master thesis. I have a problem.
When I set a trim analysis, Nastran told me this Fatal Message:

^^^ USER WARNING MESSAGE 9132 (AESTATRS)
^^^ INITIAL PRBDOFS APPEARS TO BE INVALID.
^^^ NUMBER OF NONZERO TERMS IN PRBDOFS = 6
^^^ NUMBER OF COLUMNS IN TR = 2
^^^ ATTEMPTING AN ALTERNATE METHOD.
^^^ USER FATAL MESSAGE 9133 (AESTATRS)
^^^ COULD NOT GENERATE A VALID PRBDOFS
^^^ NUMBER OF NONZERO TERMS IN PRBDOFS = 1
^^^ NUMBER OF COLUMNS IN TR = 2

I am not able to find this error in nastran manual and I don't know what's happened.

Does anyone know this error?
Thank you for your help.

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