AutoGEM Interruption Guidelines
In determining whether to interrupt AutoGEM, you should evaluate changes in the completion percentage. If the completion percentage in the status messages fluctuates by less than 10%, you should try to avoid interrupting. But if the completion percentage drops by 10% to 15% or more, that may be a sign that AutoGEM has encountered problems and will not be able to complete.
You should then interrupt and investigate areas of your model where AutoGEM did not create elements. Suppressing unnecessary geometry features or modifying model dimensions can sometimes result in cleaner geometry with a better mesh success rate.