>>>> "Volker" == Volker Franz
Volker> However, the problem does not seem to be that lpr.el from os-utils
Volker> shadows ps-print/lpr.el (it is the other way around).
At least in my case, os-utils does shadow ps-print.
M-x list-load-path-shadows generates the following:
However, moving os-utils/lpr does not make the error go away.
Volker> The problem seems to be, that the variable lpr-windows-system is not
Volker> defined as variable in ps-print/auto-autoloads.el.
Thanks. That's a much better explanation than my initial one.