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Rahul Ponginan

Re: Error #291 - No Results requested

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In a dynamic analysis, an error message occurs. Can you please let me know what to do in order to avoid this messsage?

*** ERROR # 291 ***
No output results requested for Frequency Response/Transient Analysis.
Note that displacements and stresses are disabled by default for such
loadcases. Also note that the amount of results for such loadcases may
be extremely large, and therefore output SETs are highly recommended.
***** ERROR ENCOUNTERED BEFORE COMPLETING THE CHECK RUN *****

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For any kind of dynamic response analysis, the output of the solver must be requested in advance within your input file. E.g. by requesting STRESS, DISPLACEMENT, STRAIN etc.

In HyperMesh, you can find the output requests under Setup --> Create --> Control Cards --> Global Output Requests. This will define the output for ALL of your OptiStruct subcases.
Or you can card edit your loadstep to request output for SINGLE OptiStruct subcases.

Please note that in dynamic analysis, the output for all nodes in all frequencies / times can be very high, resulting in large result files. In this case, please try to limit the output to certain observation nodes, by creating a SET (Tools --> create --> set) first and using the option = SID in your output request line.

The OptiStruct Help will explain further the options available under each output request.

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