How to check a listener in SAP for a TIBCO topic (published message)?

Hi,

We are using TIBCO as the middle ware between SAP and Documentum. For the last few days none of the IDOCs sent from TIBCO are coming into SAP.

The concerned person from TIBCO team said that, "TIBCO is publishing messages on the topic SPC.All4One.IncomingInvoiceStart.Topic but there is no subscriber available to pick up the messages. Could you please check if SAP is a subscriber for this topic?".

I am not sure how should we check this.

Any pointers on this would be greatly appreciated.

Regards

Barada