Are you seeing this error , or does it only happen when you try to open a specific module like Mechanical or Fluent?
The "ansyswbuexe encountered a problem" error is rarely a sign of a broken installation but rather a broken configuration. In approximately 80% of cases, (Renaming the Roaming Directory) resolves the issue immediately. If the problem persists after applying these fixes, the user is advised to contact ANSYS Support with the generated diagnostic file and the System Information log.
The failure can stem from several technical layers, ranging from simple file corruption to deep-seated system permission issues:
Certain advanced settings can crash the solver reliably. For example, enabling “Large Deflection” on a model with poorly constrained degrees of freedom may cause the solver to iterate to infinity. Using a direct solver (e.g., Sparse) on a model with billions of degrees of freedom will exhaust memory faster than an iterative solver. Requesting unrealistic time steps in a transient analysis can also lead to numerical overflow. Solution: Simplify the analysis first. Start with linear, static, small-deflection assumptions. Gradually add complexity while saving intermediate results.
ANSYS requires a contiguous virtual address space. Even with free RAM, Windows may fail to allocate memory for large matrices.
