Error Handling When Calling External Sql-Files

I am using SQL Server 2000. I have some files with SQL-Statements.

The SQL-Serveragent runs jobs which execute the SQL-Files:
(e.g. osql /E /n /i \serverd$lager_pool.sql)

How can I implement an error handling.

If an error occurs, the script stops, and I can't read the variable
@error

My script - table xy doesn´t exist

SELECT * FROM XY
SELECT @@error
SELECT 33

The execution stops with an error after the first line

Thanks for your help.
aaapaul