Why Revit 2010 Crash, while deleting any Function Material Layer of Floor?

[bingles7]

Please read the Short query in my 3rd Post: -

[kathy71046]

I would suggest you put in a support request if you are on subscriptions, this is what it's for.

[bingles7]

Thanks Katika. I am without Subscription. What you are doing & in which version?

To other experienced revit users: -

If it is difficult for you guys to read my prior appears to be lengthy & complex query. Following is the short & easy version: -

QUERY
The Problem is that, while deleting any Floor Layer, Fatal error occurred = [A serious error has occurred. The current action has been cancelled] . Possible Reason & Solution are awaited.

Hope to get response.

[cliff collins]

Is the floor constrained or joined to other elements such as walls, beams, roofs, etc.?
Try to unjoin it from surrounding elements.

or is it attached? try detaching it from other elements.

Another trick is to click the floor, then copy to clipboard, delete the floor which causes
the crash, then paste it back into the same place.

cheers.......