The SUBCASE ID in ATT1 field of DRESP1 does not refer to a modal FRF subcase.
Hey guys,
I am conducting a topology optimization with an eigen mode subcase. The analysis works fine. However, when setting a topology optimization the following error is given:
The SUBCASE ID in ATT1 field of DRESP1 1 does not refer to a modal FRF subcase.
The model setup is pretty much exatly the same to the tutorial: OS-2020: Increasing Natural Frequencies of an Automotive Splash Shield with Ribs.
Can you give me a hint why this error occurs?
Cheers,
Mike
... I am working with HyperWorks 2017