Error 144

Hi,
I have an error with the solver:
*** ERROR # 144 ***
CPYRA element 2195730 has singular strain functions.
Please check material data.
I'm trying to make a buckling simulation of an honeycomb cell and I choose mat 9 ort as card image but if I change to mat 1 I haven't this problem.
Thanks for attention
Antonio
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Hi Prakash,
Thanks for you answer. E1 and E3 are not provided because the data sheet provides me only the modulus along 2 direction.
Should I put a symbolic value and try to run?


Hi Prakash,
Thanks for you answer. E1 and E3 are not provided because the data sheet provides me only the modulus along 2 direction.
Should I put a symbolic value and try to run?
Yeah, please do so. Maybe E1=E2?
I think the problem is coming from the material.
can you please check the material data?
Why E1 is not provided?