BPM Collect Scenario errors at transform stage

Question

The BPM Collect scenario is using a Fork within a Block.
Branch 1 - Loop Receive Append Container Endloop
Branch 2 - Receive step of triggerIdoc
End of Block
Transform step - multiline container of XML documents to one XML document
Send step
BPM Errors at Transform step with JCo mapping not available.
Whilst BPM in Error (Workflow in Error) more messages being received but never processed as the RECEIVE event is "lost" for these messages.
We are looking at redesigning the BPM to reduce the likelihood of this transform error.
In the meantime was looking at ways to Alert the administrator straight away to the error. As we have a workaround to get the process going and to pick up the stranded messages. So have started setting up the ALERT categories as described in How to Guide, for Adapter and Interface. Will this work?
Also in the Transform step there is a box (system exception) but I can't enter anything in. Is there a way to do this if the Alert category doesn't report an error in the BPM. OR do I have to add the Transform step into a Block of its own?
Advice gratefully received if we come up with a working solution will post it out here. Have spent a large amount of time reading posts and blogs on here but have not got a clear picture yet of what is best to do.
thanks,

Answer 1

> Whilst BPM in Error (Workflow in Error) more messages
> being received but never processed as the RECEIVE
> event is "lost" for these messages.
This should give you an issue called Parked Messages. The best way to deal with this is to actually define a Local Correlation. In the Block Step properties, you will have an option, Use Correlation --> Give the name of the Correlation . This will make sure that when there is an error, the Correlation become inactiva and a new BPM instance is created.
> In the meantime was looking at ways to Alert the
> administrator straight away to the error. As we have
> a workaround to get the process going and to pick up
> the stranded messages. So have started setting up the
> ALERT categories as described in How to Guide, for
> Adapter and Interface. Will this work?
Not sure if this will work. The issue is that the messages are passed to the IE already and will be in wait step waiting for an active BPM 's receive step How will another interface pick up this message?
> Also in the Transform step there is a box (system
> exception) but I can't enter anything in. Is there a
> way to do this if the Alert category doesn't report
> an error in the BPM. OR do I have to add the
> Transform step into a Block of its own?
This is what is called exception handler. Defined a Exception handler for the Block. Right Click block, insert Exception Branch, give name of the Hanler and then you can select this in the Transformation Step's System Error. This is like Try - Catch of Java.
Regards
Bhavesh