Runner.Halt generates "Execution is already completed" error

Test Complete 15.20

Web testing

VBScript

All my tests worked perfectly in Test Complete 12.60.

Now, in 15.20 the Runner.Halt instructions generate an error "Execution is already complete".

It's as if the .Halt procedure is trying to do something after the script has ended.

The other 4 statements in the 'If" execute properly.

Any ideas.

If TCID_haltOK Then
    SignalHalt
    ScreenShot "WaitforENAFail"
    WriteEmail "WAITFORENA time out obj=" & obj & " name=" & name
    WriteSPREADSHEET "TCID-HALT-0000-0000", "", "FAILED"
    Runner.Halt "WAITFORENA time out obj=" & obj & " name=" & name
End If