• Use transaction SMQ2 on the PI server – Used for checking inbound queue
• Enter the client number if required -> Enter or Execute
• Double click it on the displayed queue
• Click Unlock Queue button
• Give it some time and refresh
• If, after a while, it’s still locked and not clearing
• Use transaction SXMB_MONI
• -> Select Monitor for Processed XML Messages
• -> Execute
• -> Status group ERRORS
• -> Execute.
• -> Select & Restart
• -> If a message box pops up – > Click on Retain and Tick mark
• Use transaction SMQ2 to confirm

If it’s still not working, you need an expert to sort this out. Contact Noesys for on-site services in the UK or off-site around the world.

SMQ1 – qRFC Monitor for the outbound queue. Use this transaction to monitor the status of the LUWs in the outbound queue and restart any hanging queues manually
SMQ2 – qRFC Monitor for the inbound queue. Use this transaction to monitor the status of the LUWs in the outbound queue.

RSQIWKEX job — automatically resets the inbound queues.
RSQOWKEX job — automatically resets the outbound queues.

Use the above with caution and in assistance with someone who knows  exactly what these do or read up before you do so.