HI all,

I am trying to use ABAQUS for optimising the weight of a structure setting the first eigenfrequency as a constraint. However, TOSCA gives me back the error:

LC_SET command allows only one eigenfrequency if TYPE = DYN_FREQ.

(ERROR   ) Please change the SUBSTEP value from  to a single eigenfrequency

I also tried to manually modify the .par file but other errors like

The item MODENUMBERS is only admitted for values greater than 2.

appear.

I also tried to switch the constraint and the objective but no luck.

Can you help me?