QV22 Script error code in Qlikview

Scripterror code are generally used to handle script error i.e. error handling in qlikview.

This variable will be reset to 0 after each successfully executed script statement. If an error occurs it will be set to an internal QlikView error code. Error codes are dual values with a numeric and a text component.
 

• No error (Script Error =0)
• General error (Script Error =1)
• Syntax error (Script Error =2)
• General ODBC error (Script Error =3)
• General OLE DB error (Script Error =4)
• General custom database error (Script Error =5)
• General XML error (Script Error =6)
• General HTML error (Script Error =7)
• File not found (Script Error =8)
• Database not found (Script Error =9)
• Table not found (Script Error =10)
• Field not found (Script Error =11)
• File has wrong format (Script Error =12)
• BIFF error (Script Error =13)
• BIFF error encrypted (Script Error =14)
• BIFF error unsupported version (Script Error =15)
• Semantic error (Script Error =16)

Documentation
http://community.qlik.com/docs/DOC-5342

Example:
Check column existence in table