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error 557 while trying to execute a multiobjective optimization with the dresp2 "function" card

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flaecheopti_multiobjective.femHello,

 

i was trying to make a multi-objective optimization by combining a "massfrac" and a "compliance" response in the dresp2 "function" card. Unfortunately I always get the following error message:

 

  A fatal error has been detected during input processing:

  *** ERROR # 557 ***
  DRESP2 3 is not referenced above the first SUBCASE.
  This type of response must be specified above the first
  SUBCASE.
  This error occurs in DESOBJ 3.

 

I don't understand how I'm supposed to reference the dresp2 above the first subcase. The Hyperworks Help does not specify how to reference it above the subcase only that in some cases it is necessary. I tried to create the responses before creating the loadstep but that didn't solve it. I also tried to just cut+paste the objective section from the subcase information in the .fem-file infront of the loadstep section. But running the edited .fem-file from the command prompt didn't work either. Am I missing something here?

 

The .fem-file is (hopefully) attached. Thanks for any helpful tip!

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Hello Prakash,

 

When I tried to run the optimization. I face below error

*** ERROR # 557 ***
 DRESP1 1 is not referenced from within a linear heat transfer SUBCASE.
 This type of response must be specified from within a linear heat transfer
 SUBCASE.
 This error occurs in DESOBJ 1.

 

I have attached the fem file for reference can you please help to understand where I am doing mistake

Optimization_Beam meshed.fem

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Hello Prakash,

 

How you are able to fix the error. I tried with different model but I keep on getting the same error. I tried to create load step after objective but still same the error. Can you please explain in few steps how you fixed it. Attached is the file I am working on to fix the issue.

 

Thanks,

Cube_Thermal_Compliance.fem

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Hi Darshan,

 

Open the .fem file in any text editor and move objective function below the subcase. 

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Hello, I found the same error:


 *** ERROR # 557 ***
 DRESP1 2 is not referenced above the first SUBCASE.
 This type of response must be specified above the first 
 SUBCASE.
 This error occurs in DESSUB 2.

 

I read the topic but I didn't understand how to fix the problem.

Could you kindly help me understand?

Thanks in advance.


Alberto

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Hello good people,

I am getting the same error.

*** ERROR # 557 ***
  DRESP2 3 is not referenced above the first SUBCASE.
  This type of response must be specified above the first
  SUBCASE.
  This error occurs in DESOBJ 3.

can you please tell me how to fix this from the solver graphics window?

I am attaching my FEM file

topology_Linear_Steady_State_Heat_Convection_Analysis.fem

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