Stress Isometric does not create a drawing file, why? Reason #5.
User Security features “Prevent access to registry editing tools” has been disabled. At this time, AutoPIPE needs to be able to make modifications to the system's registry. Adjust User permission so they are able to write to the system's registry.
Reasons why stress Isometric was blank or does not create a drawing file?
OPIM Stress Isometric Troubleshooting Guide