it means, that the delta load is still running in SAP.
Please check the request status into SAP:
1. Access SAP
2. Call TCO smq1
3. Check the application your delta process is still Running ( f.e. 2LIS_03_BF )
4. Dubbleclick with left mousebuttom at the DataSource
5. Search the Requests with Status ne finished / done
6. restart the broken request run
7. if it is still stops without success - del Request
Same procedure via TCO SM58
Visit in SAO via TCO BD87 a broken iDoc ascending your Delta process.
Dubleclick the broken iDoc and try to restart the writeprocess.
After finalizing the analysis, restart your Delta Request.