I have no experience with depreciation, so contacting Customer Support might be the best alternative. The best I can do is poke around on the Federal and Maryland forms and worksheets to try to recreate the error, but I doubt that I can do that without details of the type and value of asset involved.
Line 8 of which form is giving you the error?
What type of asset?
Make sure that you are making all entries in step-by step mode, not in forms mode.
