BPM Messages in scheduled status

Hi,

In PI I could see the BPM messages are processed in scheduled status and the corresponding message with ' Transfered to Process Engine' .

when i clicked the scheduled msg flag it shows as 'Message 4F8698FF430B0570E10080000A92C0EC held at process 000000236019 but not yet processed'

and I checked in SWWL there were many process, how to I process the message now?

can i delete all entiries in the SWWL tcode, and there were around 90k process .

Im new to BPM need to know how to monitor BPM messages and to know how to process this

Pls suggest.

Regards,

Sethu.