ERROR 760 help

Hi! This is one of my first approaches to RADIOSS analysis. I tried to model a simple laminate using MAT25 and STACK51 property, but before RADIOSS starts to elaborate the model it faced error 760. I read it is a very general error, but I do not have contacts in my model, so I really don't know what I'm doing wrong.

I attached the .hm file for some suggestions. Thanks in advance

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