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How to fix the problem with time step??

How to fix the problem with time step??

How to fix the problem with time step??

I had simulated pipe structure with MSC Marc version 2010, and i have a problem with it.

i look up on (filename.out) It show error as

" The time step size has become too small to continue the analysis due to
too many time step cut-backs in the current increment.
It is not possible to obtain convergence with the specified
allowed maximum number of cut-backs. "

Therefor I try to increase and decrease time step size, but it's be the same error result. Then I change
shape of pipe to be plate and simulate with same any value and it's work! I don't know how to fix this problem
anymore. I want the suggestion to fix it.

If my word is not clear, please do not hesitate to ask me. (English is not my native)

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