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Underlying DBMS error when connecting to Geodatabase

Question asked by ARaheem on Jun 21, 2017
Latest reply on Jul 5, 2017 by ARaheem

When executing sdetable command from command prompt I am getting an Underlying DBMS error(-51).

I have Oracle 11g database with ArcSDE 10.1 installed.


Following is the sdetable command,

sdetable -o describe -t sites -i sde:oracle11g:mydb -s -u sde -p sde


Following is the result:

Error: Underlying DBMS error (-51).

Error: Could not create a connection on server, for user sde

Extended DBMS error code: -1
Unknown error
No extended error.


Following is the log in sdedc_Oracle.txt:

DB_open_instance()::db_connect (OCI8) error: -1
CAN'T OPEN INSTANCE: sde:oracle11g.
Spatial Engine Connection Failed (-51).
Cannot Get Access to Instance sde:oracle11g


Any insight on these type of errors and the probable reasons that could have led this error is appreciated.