Urgent : ActivePrincipalNotFoundException: No active group found with GroupPrincipalId: 7D6E682A-54C

Hello

i'm administering and maintainng an application based on LiveCycle ES 8.0.  Recently i've received the exception described in the post title.

The application's users list is synchronized with my customer's ldap , and  consists of a workflow to digitally sign some pdf files. Once the first user has  signed the file an email is sent to the next user.

The component sending the email is a custom component developed by my firm,  as last step it uses the next user email address to query the adobe database and  translate it to a unique identifier (select id from EDCPRINCIPALENTITY where  email = ? ) and outputs the result into "UserUID" , defined as output variable  in the component. The output component variable is mapped to a process variable  (UserID) and a route brings the process to a UserService (assign Task).

Now for a specific user the id gets resolved and return to the UserService,  but the UserService stalls with the below exception (if you need full stack i  can provide it) :

2011-01-31 17:17:34,017 INFO  [STDOUT] Jan 31, 2011 5:17:34 PM  com.adobe.idp.taskmanager.dsc.userservice.UserServiceImpl  createTaskFromDialogProperties
WARNING:  UserServiceImpl:createTaskFromDialogProperties()  No active principal was found  when trying to create the task, this item will stall or have a fault fired.   Exception message is: No active group found with GroupPrincipalId:  7D6E682A-54C0-FD98-8BBF-A80ED367A8BC
com.adobe.idp.taskmanager.dsc.client.task.ActivePrincipalNotFoundException:  No active group found with GroupPrincipalId:  7D6E682A-54C0-FD98-8BBF-A80ED367A8BC

...

2011-01-31 17:17:34,019 INFO  [STDOUT] Jan 31, 2011 5:17:34 PM  com.adobe.idp.taskmanager.dsc.userservice.UserServiceImpl  createTaskFromDialogProperties
WARNING:  UserServiceImpl:createTaskFromDialogProperties()  An exception occured trying to  create a task, and the exception is unrelated to assigning to an invalid user.   Exception message is: No active group found with GroupPrincipalId:  7D6E682A-54C0-FD98-8BBF-A80ED367A8BC
com.adobe.idp.taskmanager.dsc.client.task.ActivePrincipalNotFoundException:  No active group found with GroupPrincipalId:  7D6E682A-54C0-FD98-8BBF-A80ED367A8BC
at  com.adobe.idp.taskmanager.dsc.service.TaskManagerServiceImpl.getQueueForPathExpression(Ta skManagerServiceImpl.java:5807)

   

this seems to happen only for this user and this kind of document. I've  checked the configuration of the users and groups and everithing looks  fine. There aren't inactive services and as already stated , at this moment,  this seems to happen all for this user.

Moreover i've tried to retray the stalled task and it has gone on (as if  the user had signed the document) but then i've got anther error :

2011-02-01 11:08:36,971 ERROR [com.adobe.workflow.AWS] stalling  action-instance: 112318 with message: ALC-DSC-002-000:  com.adobe.idp.dsc.RequiredParameterException: Parameter: document is  required.

what does exactly mean the first exception ? what could i check to solve  this problem ?

I need urgent help, since at least this user is stuck.

Thank you in advance