SAP Message RSRV050 - Internal error: Elementary test does not implement interface IF_RSRV_ATOM

Diagnosis
This is an internal error. The system omitted one of the basic tests,because it was unable to run it. This error message has also beenwritten to the application log.
The following information is inteded for SAP.
Before it can be carried out, a test has to implement the IF_RSRV_ATOMinterface in the test environment. During the test, the RUN method(without parameters) is called. You are not able to use this interfaceto access the class &V1& that implements a basic test.
Contextual information: (Program: RSRV_START, Form: RUN_ATOMS)
NODENAME = &V1&
STATE = &V2&
TEXT = &V3&

Procedure
Check whether class &V1& implememts the IF_RSRV_ATOM interface. If itdoes, there is an internal error in the test environment. Post an errormessage.