Obviously, error has to do with module last linkedited with S/360 Linkage Editor.
Not obviously at all. . . It is doubtful that your code was linked with anything remotely involved with an s/360. . .
It is about 99% sure that you have some mistake in your use of components on the free site.
From the references:
. . .
Computer Center Help Desk at (312) 413-8080 for proper refer-
ence, replace program.
As suggested previously, you may need to contact the free site support people.
If you receive a s806-04 and the problem module name is one you compiled/linked, you have made a mistake.