Printing on AOS with a AIF-Webservice

Hi all,

I have createdan AIFweb service to enable an external application to print specific reports in AX.
Calling theweb serviceworks fine.
"Only"the callof the print routine(to a shared printeron the serveron which the AOS service is running) creates an error messagein theAIFexceptions:

Exception:Warning
Module:AIF
ChildSystem:AifRequestProcessor-executeServiceOperation
Exception Message:Thereis no default printerselected.

For testing, I've logged in withthe AOSservice-user onWindowsandselecta default printer.But that did not help.

-In theconfig of theserver and clientprinting toAOSis enabled.
-TheAOSservice is restarted.
-The printer is selectable in theAX clientto print(withthe prefix "AOS").
-When I callthe web service methodthrough atest job printing works.

Doesanyone elsehave any idea whatI could try?