flow hangs after useraction

Do you have the UserAction assigned to more than one user or task? It could be that if you do it is waiting for their feedback as well.

Sounds like it is waiting on the user to perform another action. Did you check the log file in $LAWDIR/bpm/wflog to see where it is stoping? You could then check your flow to see if it is not perform as intended. Good luck.

It sure sounds like more than one user is assigned to the node (the node assigned to a task to which multiple users are assigned).
Check the User Action General tab and make sure that the box "Any one recipient takes an action" is selected. If any of the other boxes are checked, then more than one user must take the same action for the flow to proceed.

Thank you all. It was exactly that. I could have sworn that I had the "Any one recipient takes an action" checked, but seem to have checked the next one (all recipents take same action) by mistake. Much appreciate the help.