Could you please give us more details about your workflow to help us understand where the problem might be? Could you please answer the following:
- Are you assigning materials in the geometry preparation tool (SpaceClaim, Discovery) or are you using materials from Ansys Workbench?
- Are you using optiSLang standalone or optiSLang in Ansys Workbench?
- What version of Ansys are you using?
Any screenshots of your workflow, parameter tables, scripts are welcome.