Running Ansys in Batch Mode: element is unselected

Hello,

I'm trying to connect Ansys APDL to Matlab in order to run a pre-defined Genetic Algorithm with static analysis.

For the interface between the softwares, Ansys exports the maximum equivalent stress and total mass to txt files, using the /output and *vwrite commands. I've built the model and ran in the interactive mode and it is working just fine (exporting results also). But when I run Ansys from Matlab in batch mode, the maximum equivalent stress value is not exported.

Does anyone has an idea of what might be the problem and how to solve it?

I've looked up into the output and it appears a warning stating "Node ## from element ## is unselected" for all of the nodal points of the model.

Best regards,

Rui

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