Error message when draging from Outlook folder

[elorup]

When I drag-drop folders from my Outlook I sometimes receive an error message at the end although the complete folder content seems to be imported into UR.

The error message:
Error pasting data: systemcall has failed.

(second part of the message is originally in german on my PC - Systemaufruf ist fehlgeschlagen).

It happens with bigger folders. E.g., just now happend with 500 messages in a folder, but I didn't test systematically if number of messages or size of folder matters.

Need more details?
A known issue?

Regards
Eric