Is anyone running dual tower mode in Empower 3 for 7890A and 7890B?

<p>I'm running 7890A and 7890B instruments in Empower 3 FR2 HF1.  I'm trying to run dual tower simulaneous injections, but continue to get "Enable dual tower mode in method".  I've got both injectors selected in the instrument method and cannot find any parameter settings in the sample set method to resolve this problem.  Is anyone running dual tower mode in E3 for 7890A or 7890B?</p>
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