Workaround :
1. Copy the default Oracle login object.
Rename it to <dblogin>@. The @ symbol will be stripped off to allow the copied login to use the same username.
Fill in the Network Alias for the Oracle Database or remove the network alias.
2. Assign this login to the Forecast job.
3. Run the Forecast job.
4. If the job does not Abort, assign this login to any job using the default Applications Manager Oracle db Login.
Alternatively, the $TWO_TASK variable may need to be set or removed.