Hey, I have tried to do a test run on my model in Optistruct and I have encountered this message.
*** ERROR # 41 ***
CBAR 1525774 has an invalid orientation vector (zero length
or parallel to the element axis).
I have looked up that specific element but i cannot find the issue. Furthermore the element is not even a CBAR Element but it is a CBEAM Element. Maybe someone has an idea how to solve this problem. Thanks in advance.
Here are more picture to clarify the described issue:



This is the Beamsection used for the CBEAM Element. I have attributed it to the Schrauben_Property seen in the first two images.
best regards!