When i run certain procedures through cron i get the following error

ORA-02055: distributed update operation failed; rollback required
ORA-02068: following severe error from ERPLINK
ORA-03113: end-of-file on communication channel
ORA-03113: end-of-file on communication channel

source db:Solaris 5.6 with Oracle 8.0.6
Remote db: Solaris 5.8 with oracle 8.1.7.4.
anybody who got this error in their env and solved?