Guild Wars 2

So, the question is quite simple:
is it even possible to join a party from another region to do common dungeon run?
Every time I try to do that – some network error pops up:
“Network error.

Please check your internet connection and try again. (Code=1006:9:7:388:101)"

. But it doesn’t specifically says that it’s about joining another server but it’s about some network/connection problem so I can’t be sure if there is SOME way to do that.

Anyone with answers will be appreciated

No, you cannot join cross-region like that. If you’re on an EU server, you can’t join with a US party (and vice versa).

Physically different server clusters. One in Austin Tx, USA, the other in Frankfurt Germany.