An external tool must be:

• Certified against the BC-eCATT interface. Certification should cover the target release as well as the user interface to be tested.
• Installed on the front-end machine that you run the tests on.
• Registered on the backend system that eCATT runs on. To do this, maintain the Customizing table, ECCUST_ET. You can maintain the table manually or add entries by using the function module, SET_EXTERNAL_TOOL. You should provide the following information:
• A working name for the tool
• The PROG_ID of the test tool's certified interface
• A description of the tool
• The local database of the tool

In the standalone case, you need the authorization SAP_ECET to save and load test scripts to and from eCATT.