Can't open File because of scale factor error

[islam_magdyahmedahmedhabiba]

I was working on my project normally, next day it cannot be open and I get this error message:

This scale factor would make the imported object too large. Reverting to the previous scale factor.

Any Ideas? 

[a_meteni · Accepted solution]

Have you imported/linked CAD file into your model?

Are the units matching between the two files?

[islam_magdyahmedahmedhabiba]

Yeah I did, It was a Rhino file,  I opened the file itself again and changed the unit and it has been solved.
Thanks a lot for the tip.