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The curious thing is the sends work on the second stage box. It does not recognize the inputs.
It is a permanent installation and we ran everything including the power amp location based on using two. Now we are scrambling under the stage and elsewhere to relocate the inputs and sends.
I questioned our salesman several times leading up to the install why I could find no diagrams or backup on this configuration. He assured me that it was possible only to come out after it was set up that he must have been misinformed.

Thanks for the suggestion on a possible solution.