>On one project on which I am working on a client, certain errors occured only when the EXE and data files was copied to a separate folder, so that's what I did. For debugging, I ran the EXE from the IDE - fortunately, the error still appeared.
>
>Now, to the error that stumps me. In a certain part of the program, I get a "alias name is already in use" error. The line that causes the error turns out to be something like this:
>
>

>set classlib to SomeClassLibrary additive
>

>
>Since I suspected that the IDE may be showing me the wrong line number - since this has already happened to me before - I try giving the command from the Command Window - same error message. On the suspicion that the classlib is not found, I invent a non-existent classlib:
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>

>set classlib to abcde additive
>

>
>But I get a different error message, basically, file not found - so that is not the cause.
>
>Now, why would a "set classlib" produce an "alias name is already in use" error? I thought Visual FoxPro would simply add the classlib to the list of classlibs, if it wasn't in the list already. Nor does set("path") point to any folders that might contain additional copies.
>
>I suspected there may be two classlibs with the same name in different folders, but the project only lists one of each.
>
>What else might I check for?
>
>TIA,
>
>Hilmar.

How many libraries you already loaded? Would you have the same problem if you don't use additive keyword?