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I solved this problem. I had the spkrmatrix effect in rack space 7. I deleted the rack effect in space 1. Then added the spkrmatrix back in space 1. It started working. I have the mains summed into the sub channel and it is working. I would like to use the “Sub” channel directly in so I can control the sub level independently, but that isn’t working. If anyone can help with this, please chime in.