The stored procedure isn't valid in ms sql 2000, because of this line:
where cust_name=@name
Perhaps you intended this?
select @cust_id = cust_id from x where cust_name=@name
I tested the perl and SQL you posted with the above modification and experienced the same problem when run from Windows XP using perl 5.8.8, dbd::odbc 1.13. I do not experience this problem on openbsd using perl 5.8.4, dbd::odbc 1.13, and iodbc.
Looking into it further the issue is this line:
$dbh->{odbc_SQL_ROWSET_SIZE} = 2;
With that line I get the error, without it I don't. Please review
DBD::ODBC and check if this option is what you want.
By the way - when testing for the non-existence of a record in sql server you should check 'IS NULL', not compare to an empty string.
Like this:
if(@cust_id IS NULL)
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