Execute command OVRDBF MYFILE OTHERMBR where OTHERMBR is the one you wish to insert records into. Do this before doing anything with SQL.
An ALIAS might be a good idea, but be aware that it creates a permanent (SQL) object. An OVRDBF might be needed, especially if the member name is variable. If creating SQL objects is not allowed, then OVRDBF is required.
For the original question, exactly how was QCMDEXC invoked? It would need to be invoked as a stored proc if it was going to work at all. And what does the OVRDBF look like? Some parms might need changing.