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Material Nonlinearity in Topology Optimization

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I'm trying to use a nonlinear material (MATS1) in topology optimization which is resulting in the following error:  


*** ERROR # 4650 ***
 The design space for topology/freesize optimization can not contain nonlinear material.



Is there any way to use a nonlinear material in topology optimization or is it currently not supported?


I'm using HyperWorks 2017.2 with the following hotfixes:


HyperWorks Desktop 2017.2.1
HyperWorks Solver 2017.2.2

Thanks in advance


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