So the situation is as follows: connect with portable TeamViewer 6 to a Quick Support Team Viewer remote partner.
Then this error occurs:
The remote TeamViewer is running an old version which is out of date..
In fact the error occurs so quickly that it appears like it didn't attempt any remote communications at all.
Despite the error, the remote version is not out of date, as colleague can connect with exactly the same TeamViewer 6 version as me. What can it be?