Polarman, or anyone else for that sake.
Have you been able to resolve this issue?
At one of our clients we recently introduced the function address error too on their citrix servers which are running server 2008 R2 . Strangely enough, it only starts appearing after a few days. A reboot seems to resolve the problem for some time again.
We are using the latest version of the xerox global print driver PCL 6 Version: 5.347.6.0 (x64)
A roll back is not a solution since we will then lose support on some new multifunctionals, a daily reboot schedule seems the only thing we can do but we would like to avoid that.
Any suggestions would be most welcome.