The steps to follow when you are unable to open HandiLedger due this error are:
[Note: xxxxx above represents the individual path where the Hsoft directory resides]
all users to close all HandiSoft programs
navigate to and open the Hsoft, Data files on the server drive
locate and rename the Entity.Dat file
go to and open the Hsoft, Data directory on the backup prior to the error appearing
locate the Entity.Dat file in the backup and copy and paste to the Hsoft, Data directory on the server drive
open HandiLedger