Hi charlie
Does the customer face this issue only with this model or does this happen with all models? If it is just with this specific file, you can send it to me so I can test it.
I recommend copying the geometry into a new design and try saving that.
You can try resetting your user settings from File > SpaceClaim Options > Advanced > Reset All User Settings.
It may also be worth doing a clean uninstall/reinstall to see if that helps.
Regards.
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