I started doing the proforma from 2018 Lacerte to 2019.  Most clients did proforma, but for several dozen I received the error "Exception occurred in the tax engine."  The Diagnostic Report says "Failed to transfer. Please verify that client forms can be viewed in 18TAX then retry."  I did verify that the client forms can be viewed.  I restarted my computer at least 3 times, and I reinstalled Lacerte.  Nothing has corrected this error.  What else should I do?