'EPZone' object has no attribute 'cenPt'

Hi everyone,
I have a mass that is a bit complex.one floor is under the ground so I had to decompose it.for this action,I encounter with this error.please help me.

Best Regards.

There has been discussions previously on this topic.
Check for this to see them.
Then, if you don’t find the answer, post again.

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Hi Abraham,
I read this discussion but I couldn’t solve it. I am trying to draw my building again.I will come back soon.