Look at what conditions would cause the RAISERROR line to be executed.
Open up the proc, go to line 724 and work out, from the code, what it does and what would make the RAISERROR run
It's a custom error, it's something that the developer put into that procedure, it's not something we can help you with.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability