OID User Recon schedule task got strucked (running for long time eventhough the count of users is le

 Pls suggest if anyone have idea on this error

As a part of OID phone number field update we tried to run schedule task "OID User Recon" schedule task but it is failing initial start by thrown error as follows....

 ...

ERROR,20 Sep 2012 07:27:03,714,[XL_INTG.OID],Exception in OID:tcTskOIDUserReconciliation:getOrgKey() Error in findOrganizations().

DEBUG,20 Sep 2012 07:27:03,714,[XL_INTG.OID],Exit from method OID:tcTskOIDUserReconciliation:getOrgKey()

ERROR,20 Sep 2012 07:27:03,777,[XELLERATE.DATABASE],Class/Method: tcDataBase/writeStatement encounter some problems: ORA-02291: integrity constraint (XLADM.FK_A

CT_ACT) violated - parent key not found

java.sql.SQLException: ORA-02291: integrity constraint (XLADM.FK_ACT_ACT) violated - parent key not found