OIM Troubleshoot : .NullPointerException at getAttrColumnName during Trusted Recon

Problem Description :- I imported a Trusted-Reconciliation set up from one of the working environment to another environment. When I run the trusted recon on the new environment, I got the following error.

ERROR,21 Dec 2010 17:33:45,658,[XELLERATE.SERVER],Class/Method: tcRCE/createUserRecord encounter some problems: {1}
java.lang.NullPointerException
at com.thortech.xl.dataobj.util.tcAttributeSource.getAttrColumnName(Unknown Source)

I examined the "Reconciliation Event History" (Design console -> Recon Manager) and found only one Action called "Event Received" is logged. The successful recon usually have at least three Actions like
1. Event Received
2. Data Sorted
3. Created User
In my case the user is not getting created in OIM's USR  table .
 
Solution : After banging my head for 2 days, finally I found the dumb solution.
1. Go to "Xellerate User" process definition.
2. Delete all field maps from "Reconciliation Field Mapping".
3. Redo all the field mapping again.

I think this occurs when export and import of configuration done from one environment to other. Definitely a bug in OIM 9102 BP11.

OIM How to : Delete OIM Users

Never delete the OIM users. That is the OIM recommendation. But while playing in development environment, we sometime mess up OIM with too many unwanted Users. In case you wanted to clean it up here is the little script that may help. I got this from http://forums.oracle.com/forums/thread.jspa?threadID=1997648&tstart=15 .

delete from oud where oiu_key in (select oiu_key from oiu where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX'));
delete from osi where req_key in (select req_key from req where orc_key in (select orc_key from orc,usr where orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX'));
delete from osi where osi_assigned_to_usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from osh where osh_assigned_to_usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from rcd where rce_key in (select rce_key from rce,orc,usr where rce.orc_key = orc.orc_key and orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from rch where rce_key in (select rce_key from rce,orc,usr where rce.orc_key = orc.orc_key and orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from rcu where rce_key in (select rce_key from rce,orc,usr where rce.orc_key = orc.orc_key and orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from rcb where rce_key in (select rce_key from rce,orc,usr where rce.orc_key = orc.orc_key and orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from rpc where rce_key in (select rce_key from rce where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX'));
delete from rcm where rce_key in (select rce_key from rce where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX'));
delete from rcp where rce_key in (select rce_key from rce where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX'));
delete from rce where orc_key in (select orc_key from orc,usr where orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from oio where orc_key in (select orc_key from orc,usr where orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from oiu where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from oti where orc_key in (select orc_key from orc,usr where orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from osi where orc_key in (select orc_key from orc,usr where orc.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from orc where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from upd where upp_key in (select upp_key from upp,usr where upp.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from upp where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from usg where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from uhd where uph_key in (select uph_key from uph,usr where uph.usr_key = usr.usr_key and USR_LOGIN='USERXXX');
delete from uph where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from pcq where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from rcu where usr_key in (select usr_key from usr where USR_LOGIN='USERXXX');
delete from usr where USR_LOGIN='USERXXX';