Hello Anselm,
Could you please confirm if the receiver system is multi-client system ?
Also what is the deletion technique used in your TDMS package.
Please check what is the values of Cluster bytes currently set in the table - CNVMBT09CTR .
Also share the total size of the table DFKKKO, DFKKOP in your receiver system and total row counts for these tables in respective receiver clients.
Thanks,
Rajesh