After upgrading to TOAD 8.6, the Explain Plan does not show in the Explain Pan tab. No error messages appear.
WORKAROUND 1:
1. In the SQL Editor write and execute a Select statement.
2. Click on the 'Explain Plan' icon, which is located in the Editor toolbar. The icon is the image of an Ambulance.
You should now see the information on the Explain Plan tab.
WORKAROUND 2:
Insert the schema name where the Toad_Plan_Table has been created into the 'Plan_Table' field.
For example:
Schema Name: Scott Table: SYSTEM.Toad_plan_table (<-- Notice "SYSTEM" owner of the Toad_Plan_Table)