Found the solution :)

link text

Change IDD. This needs an IDD change.

From A3 ; \field Output:Variable or Output:Meter Name \required-field \type external-list \external-list autoRDDvariable \external-list autoRDDmeter

to A3 ; \field Output:Variable or Output:Meter Name \required-field \type external-list \external-list autoRDDvariableMeter