CcBPM Collect Pattern Error

Question

All,
Im trying to do a collect pattern based on time example. This is what the BPM does,
1. Receives the IDoc from another R3 system.
2. Collects the IDocs based on a correlation and there is a timer for 3 mins.
3. Merges all these IDocs using a transformation.
4. Sends the the merged xml to an FTP location.
When i get the first IDoc message - in SXMB_MONI it says inbound side is ok and there is an error on the outbound side... and in the technical log - it gives the following error,
Work item 000000046192: Object FLOWITEM method EXECUTE cannot be executed
Error when executing work item '000000046193'
If i remove the block and just make it a straight forward collect the xml (only one XML since there is no timer), transform and write to FTP - it works fine.
Any ideas?
Thanks.

Answer 1

That link is almost similar to the example we have and it gives the same error as i mentioned earlier.
One more thing - we tried changing the BPM the following way,
1. Start
2. Begin Block
3. Receive IDoc.
4. Container operation to add the IDoc to multiline variable.
5. End Block
6. Transform the multiline container to an XML.
7. Send the XML file to a FTP location
8. Stop.
There is no timer or no collect pattern in above example... this also gives the same error as in post 1. But if we remove the Block (#2, #5 in the above BPM), it works without an error.
So - it looks like the block is causing an error... or are we missing something else?
Thanks.