'Serious error' occuring when changing elevation floor levels

[Anonymous]

Hi, When I try to change the finish floor levels on my project to correspond to the topo surface I get a serious error message and I am unable to move up the elevations. Currently the garage floor level is a 0.00. The topo surface is up higher.

I need to change the garage floor level to sit at r.l. of 45.0 (approx.). Everytime I try and edit the level I get the same error message. See the screenshots attached. What could be the issue? 

[Rafal.Gaweda]

Hi @Anonymous 

Could You please be so kind and check the same on Revit 2021?

If the issue persist please send us Revit file to check.

[martijn_pater]

Move the toposurface instead.

[Anonymous]

Moving the topo surface will change the contour r.l.'s which are to A.H.D.

I've already redrawn the job ;(

[Anonymous · Accepted solution]

Hi, I have access to Revit Lt 2020. I've redrawn the job with no issues this time so I'm not sure why this occurred.