Confirmation procedure automatic good receipt is already active

Hi Experts!

I have a problem after confirmations are saved. They stay active for long periods of time. I can see them using CO1P monitoring automatic good receipt, but when I try to process them a message tells me it is active. I checked blocked tables, I logged off, and nothing seems to work.

I found that a call to C_ENQUEUE with the object ESCORUPROC returns always with SY_SUBRC=2 when the confirmations are active but I don't know how to release them. They get released after something misteriously happens.

It doesn't happen all the time, I think one every thousand confirmations and without any pattern known.

Please help me!

best regards,

Pietro