>>Hilmar,
>>
>>have you tested SET('Classlib') against the lib to set (complete path, jusstem(), alias if specified )?
>>
>>Try also to run through all Datasessions and test agains ALIAS (against jusstem(), alias of the lib) as well as DBF (complete path of the lib)
>>
>>Agnes
>
>I think SET CLASSLIB is global, and not for the current datasession. Isn't this correct?

Yes, it should be. Thats why I say you should test the lib and there alias against all datasessions