COPY command fails with "ERROR: Cannot find oracle login for sid " (4262986)

Copy command fails and  the copy status indicates that is is failed.

The  sync_clt log indicates the  following :

Wed May 14/16:37:03.627:: LogFile = /splex/vardir2200/log/sync_clt_209_zjcis_p595a_p10378.log
Wed May 14/16:37:03.627:: BufferSize = 1048576
Wed May 14/16:37:03.627:: DebugFlag = 0x20000
Wed May 14/16:37:03.627:: <===== END CLIENT_PARAMS =====>
Wed May 14/16:37:03.627:: Getting connections from Launcher
Wed May 14/16:37:03.627:: Sending SYNC version
Wed May 14/16:37:03.627:: Receiving Server configuration and tables
Wed May 14/16:37:03.696:: Using SID: "ORACLE_SID"!

Wed May 14/16:37:03.696:: ERROR: Cannot find oracle login for sid "ORACLE_SID"! at sync/clt/sync_clt_params.cpp:73 at sync/clt/sync_clt_params.cpp:58 at sync/clt/sync_clt_messager.cpp:495
Wed May 14/16:37:03.696:: ERROR: Couldn't handle server config message at sync/clt/sync_clt_messager.cpp:134 at sync/clt/sync_client.cpp:111 at sync/clt/sync_client.cpp:185
Wed May 14/16:37:03.696:: Process Exit
Wed May 14/16:37:03.697:: User Time             : 0.16s
Wed May 14/16:37:03.697:: System Time         : 0.02s
Wed May 14/16:37:03.697:: Child User Time : 0s
Wed May 14/16:37:03.697:: Child Sys Time   : 0s