Grady,

It's a bad idea to reference workareas by number. You should use meaningfull alias or a table name. Something like

* Table name as alias
USE (filename) in 0 
SELECT <table name>
...
* Specifying alias
USE (filename) in 0 ALIAS <whatever>
SELECT <whatever>

>
>I tried your idea, but it didn't fix the trouble. I am wondering if the table name could be the problem. It is a variable in braces.
>

>USE (filename) in 2
>

>is how it is established and
>

>Select 2
>

>is how it is called when the error occurs.