Crystal Report Error

Hi Can some one tell me the reason fr the following error? I use the above code and linked it to a stored procedure to use it in a crystal report. I get an error saying

Query Engine Error: 'ADO Error Code: 0x Source: Microsoft OLE DB Provider for SQL Server Description: Error Converting data type varchar to numeric. SQL State:22018 Native Error: '

Thank You So much for your help.

http://ask.sqlservercentral.com/questions/90620/combining-two-tables-with-different-data-type.html