Help, I might be doing something not allowed

I have a process which is intended to send an initial message to a user to do something. The user is suppose to complete the task and then on our portal indicate the task is completed. When the portal gets the completed signal it will send the BPEL process a message through the AQ. Eventually there is a correlated message that is picked up in the BPEL process that sent the message.
The process is suppose to support escalation. That means when the completed message hasn't been received in the allocated time, an escalation email will be sent. The escalation is expected to repeat until the completed message is received.
Receipt of the correlated message (indicating completion of the task) is in a BPEL while loop and in a scope contained in the while loop. After the receipt of the message the Boolean to exit the while loop is set. The while loop continues to repeat until the Boolean is set true. Hanging off the while loop's internal scope is an onAlarm branch. When the alarm fires it sends an escalation message, bumps the alarm value by the next alarm moment, and then returns to the while loop.
When the process is executed:
1. I get the initial email
2. If the confirmation comes before the escalation alarm everything works as expected,I exit the while loop and proceed.
3. If the onAlarm fires, I get the escalation email, but it appears that there is an XPath failure when I attempt to set the next time for the onAlarm. The XPath looks fine unless there is a new variable environment because I'm in the onAlarm action.
I never see the onAlarm being executed in the Audit or Flow. Is that typical?
Can I not adjust the onAlarm moment for the next cycle of the while loop?
Am I limited to what I can do in the onAlarm path?

Hi BCurtis,
do you have a receive activity in your scope waiting for the message? If so, the while loop will never repeat, because it waits for the message and after receiving the message it leaves the loop. The onAlarm of the Scope is just activated once, as the scope starts.
Also you should consider that the Events and local Variables of a Scope are only active while the Scope is processed.
Perhaps you do better this way?
[!http://img25.imageshack.us/img25/222/zwischenablage01cvw.th.jpg!|http://img25.imageshack.us/img25/222/zwischenablage01cvw.jpg]
greetings,
Michael

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http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:4110947624538#22981269011674
edit
From 10g doc:
ORA-22818: subquery expressions not allowed here
Cause: An attempt was made to use a subquery expression where these are not supported.
Action: Rewrite the statement without the subquery expression.
(http://download.oracle.com/docs/cd/B19306_01/server.102/b14219/e19400.htm#sthref6020)
Edited by: hoek on Jun 10, 2009 7:56 AM

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