Frequently when I execute a sqlexec() call I get an error "file plrecurse does not exist" from fic.

This one is really weird!
Here is the only code where plRecurse exists:

modify command abOOP

…
function aoClassCont
…
if Vartype(m.plRecurse) == 'U' and !lTrue(m.tlAdd)
	aClear(@m.taObjects)
	private plRecurse
	plRecurse = .T.
endif
…

Some ODBC trace could help us find what's going on…