Hi Sven, Without looking at the logs its little difficult to pin point the cause. Can you please do the following
1. Check of the source data base, HANA version, DPAgent version, JDBC client etc are supported as per SDI PAM https://support.sap.com/content/dam/library/ssp/infopages/pam-essentials/TIP/PAM_HANA_SDI_1_0.pdf
2. Follow instructions in EIM Admin Guide Section 6.12 (assuming you are using SAP ECC) or similar instructions for other Adapters
3. Check if the time zone file configuration is done if required. Details in Admin Guide.
4. Check ports used are unique. Make sure to keep plus and minus one port free for every port used in creating remote source
5. If the above are OK, then try to reset the remote subscription you created. Alter remote subscription "" reset
6. Go to DPAgent install directory /usr/sap/dataprovagent/LogReader/ and see if the folder with "instance name" is deleted. If not then delete it.
7. Log in as configured replication user in the source data base and execute the applicable clean up script avaialable in /usr/sap/dataprovagent/LogReader/scripts
8. Do a QUEUE and DISTRIBUTE of remote subscription from HANA studio
Alter remote subscription "<remote subscription name>" QUEUE
Alter remote subscription "<remote subscriptioin name>" DISTRIBUTE
If this does not resolve your problem, please open up an incident with SAP (internal incident if SAP internal, BCP for external customer incident). Once your problem is resolved, we can share the solution in this forum to benefit of others.
Thanks Hitesh