Field description missing in data source

Hi all together,

we have here several source systems connected to our BI 7.0.

for one of th esource systems, there is a strange behaviour.

After replicating the data sources there are no field descriptions shown in the data source. technical names of the felds are all correct, but no descriptions are shown.

Has anyone an idea what is missing in our settings?

Thanks in advance.

Cornelia