Hi,
Try partitoning the BSEG table from SLT using the t-code IUUC_REPL_CONTENT - Maintaining the replication settings.
Select the schema, select BSEG, go to 'Edit settings' and enter the script in the 'Partition Command' of BSED.
eg,: PARTITION BY HASH(GJAHR) PARTITIONS 5
Try replicating now from Data Prov.
Hope it works...
Regards,
Papil