ORA-02391

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ORA-02391: exceeded simultaneous SESSIONS_PER_USER limit

Cause: An attempt was made to exceed the maximum number of concurrent sessions allowed by the SESSION_PER_USER clause of the user prfile.

Action: End one or more concurrent sessions or ask the database administrator to increase the SESSION_PER_USER limit of the user profile.

Sde.log:
Instance initialized for GISUSER . . .
DB_open_instance()::db_connect (OCI8) error: 2391
CAN'T OPEN INSTANCE: ESRI_SDE.
Spatial Engine Connection Failed (-51).
Cannot Get Access to Instance ESRI_SDE

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