Solution Combination Fatigue Tool Error

Hi,

I am trying to do a fatigue analysis and it is failing to run.

I am using solution combination (2 different load cases have been defined) and the fatigue tool.

I have selected the non-proportional loading type, strain-life, SWT, and I am looking at maximum principle stresses.

I have strain-life parameters all fully defined in the material data.

The only result I have requested from the fatigue tool is equivalent alternating stresses.

When I hit solve, I get the error "an error occurred inside the FATIGUE module", with no other indication of what the issue may be.

If i change from strain-life to stress life with gerber and plot, it works without issue

Does anyone have an idea of what may be causing this error when trying to solve for strain life?