E2087 Cmd Rej: GTT must be turned ON for G-Port

The GTT feature must be turned on before the G-Port feature can be turned on.

Note:

Once a feature that is controlled using a feature bit has been turned on, it cannot be turned off.

Recovery

1. Display the status of the GTT feature. Enter the rtrv-feat command.
2. Turn on the feature as necessary. Refer to the Database Administration - GTT User's Guide for assistance.
3. Re-enter the enable-ctrl-feat command that generated this error message.
   Contact My Oracle Support if this error message appears again. See My Oracle Support (MOS).