Hello Micha,

"Can you temporary provide the GSI (e.g. using Dropbox or such kind of service)?"

Of course: https://www.dropbox.com/s/uz2rf1efszl6kmm/190721OIYJ.gsi?dl=0

"Okay, but were the directions separated by sets during the import or was only one tree item added per observation type?"

In fact for the slope distances and zenith angles it was only one tree item but for the direction sets I have several tree items containing one stations each, here is a screenshot: https://www.dropbox.com/sh/exc1xubl3wl3b6c/AACL-ggM7KZtjJ-MCvLN1eEKa?dl=0

Regards
Edoo.