When using the 4Ds v11 SQL's Maintenance and Security Center (MSC) to verify your database, you may get messages similar to the following:

The method resource CC4D of id xxxxx is not used anywhere

This message corresponds to a method that has been "badly" deleted but is still present in the resources of your database. You will not be able to find the offending method using the 4D Explorer.

To correct the problem it suggested to run a "Repair" on your application.