Hi Venkat
Check at below points there could be something stuck
1. Try to delete running objects in R3AM1 transaction.
2. Do the same in SMQ2 for concerned queues.
3. Check also R/3 queues with SMQ1.
4. Then, run again intial transfer for product categories.
5. Ckeck also in SLG1 for any application log errors.
6. R3AI_DNL_CU is the start queue for loads from ERP. So you can delete this entry from SMQ2 of your CRM and start initial load again. And then monitor its status in R3AM1.
7. SMWP T.code and open the node "Background Jobs" and check the status of "Middleware Reorganization" . If the status is Red (Not Running) then right click on on Middleware reorganization and select "Show suggested action" and in the pop up window select Action execution button .
If it still does not work check
OSS note 1147192 - RFC queues remain in the status RUNNING.
OSS note 872533 - FAQ: Middleware.
OSS Note no. 212666 (Outbound Queue already exists in CRM:R3AI_DNL_CU
note 720819
Regards
Vinita