limitation in use of nonlinearBeamColumn Element

[sirvan]

hi everybody
is there any limitation in use of numbers of nonlinearBeamColumn Element?
i m modeling Bracings and i have to devided each bracing into 22 nonlinearbeamcolumn elements.after 1046 th nonlinearbeamcolumn elemnet the following error appears:
"failed to get copy of a material"
thanks in advance

[vesna]

This error message indicates that the name of the uniaxial material that you use is wrong. Check on that.

[sirvan]

Dear Vesna
i use this material to model Low-Cycle Fatigue:
uniaxialMaterial Steel02 1 24000000.0 2.1e10 0.003 20 .925 0.15 0.0005 0.01 0.0005 0.01
uniaxialMaterial Fatigue 8 1 -E0 0.091 -m -0.458

but unfortunately for some nonlinearaBeamColumn elements the error message appears

[vesna]

Are these the only two materials that you have in your model?

[sirvan]

yes...just these two materials are used to model 15-story CBF model.I m going to model Low Cycle Fatigue in Bracings.Consequently I have to devide each bracing into 22 nonlinearBeamColumn elements