The issued was found to have been caused by the FND_NODES table having incorrect node entries (old node from the source instance) and that no Service Manager was found for the existing node.
1. Stop all middle tier services including the concurrent managers.
2. Stop the database.
3. Start the database.
4. Connect SQLPLUS as APPS user and run the following :
5. Run AutoConfig on all tiers, firstly on the DB tier and then the APPS tiers and webtiers to repopulate the required system tables.