Error 557

Tyo

Hi,

I am tryin to minimize the structural cost using a custom function for a topology optimization, however I am running into an error.

*** ERROR # 557 ***
DRESP2 16 is not referenced above the first SUBCASE.
This type of response must be specified above the first
SUBCASE.
This error occurs in DESSUB 14.

How can I resolve this error?

Please find the attached .fem and .out files.

Thanks,

Tyo

Load Case N2 to N11_Under Truss_Stringer Only_Optimize_Cs Objective_BA.fem

Load Case N2 to N11_Under Truss_Stringer Only_Optimize_Cs Objective_BA.out