Hello Allen,
thanks for your message.
I will check your suggestions soon and will post an update asap.
My Script is working very fine. Users (local and Citrix) getting their printers when they are in the regarding AD printer group. But I don't understandy this sporadic problem.
Printers will only be removed, when I remove the user from the group. So this issue is a cosmetic problem for me. Since now the is no user who noticed that Problem (it would be affect if the user is expecting a new device at the same time). But I have a remote log what is full of this error messages. However my goal is a clean log and a reliable and stable script.

gm

Edited by GuruMeditation (2013-07-23 12:27 AM)