Maestro's Switch#.DMP file will show the following type of messages when channels are changed on the BT 8.2 switcher:

SendSS82Msg - SetMux Command [*0014]

The above message indicates that the first defined Switcher (Device0) for this unit turned on Channel 1 on Output 1. [*0 = Device 0, 01 = Channel 1, 4 = Output 1 on]. Don't want to confuse you, but I'm going to use the terms they use for Output 1 and Output 2. Output 1 = BusA = Row 1 = Green LED. Whatever. From the BT 8.2 manual: Character String Meaning Allowable Values u Unit ID 0-7 ii Input Number 01-08 o Output Number 1-2 r Output Relay 1-8 *uii4 - For input ii, set output 1 on without affecting any other audio status *uii5 - For input ii, set output 2 on without affecting any other audio status *uii6 - For input ii, set output 1 off without affecting any other audio status *uii7 - For input ii, set output 2 off without affecting any other audio status So, here are some examples from a Switch#.DMP file: [*0014]. Channel 1, Output 1 on [*0016]. Channel 1, Output 1 off [*0015]. Channel 1, Output 2 on [*0017]. Channel 1, Output 2 off [*0024]. Channel 2, Output 1 on [*0026]. Channel 2, Output 1 off [*0025]. Channel 2, Output 2 on [*0027]. Channel 2, Output 2 off [*0034]. Channel 3, Output 1 on [*0036]. Channel 3, Output 1 off [*0035]. Channel 3, Output 2 on [*0037]. Channel 3, Output 2 off [*0044]. Channel 4, Output 1 on [*0046]. Channel 4, Output 1 off [*0045]. Channel 4, Output 2 on [*0047]. Channel 4, Output 2 off [*0054]. Channel 5, Output 1 on [*0056]. Channel 5, Output 1 off [*0055]. Channel 5, Output 2 on [*0057]. Channel 5, Output 2 off [*0064]. Channel 6, Output 1 on [*0066]. Channel 6, Output 1 off [*0065]. Channel 6, Output 2 on [*0067]. Channel 6, Output 2 off [*0074]. Channel 7, Output 1 on [*0076]. Channel 7, Output 1 off [*0075]. Channel 7, Output 2 on [*0077]. Channel 7, Output 2 off [*0084]. Channel 8, Output 1 on [*0086]. Channel 8, Output 1 off [*0085]. Channel 8, Output 2 on [*0087]. Channel 8, Output 2 off The following was the result of a function that starts with all channels of on both outputs and turns on channels 1 & 2 on both outputs: 05/05/06 10:17:06.57 [0B98] SendSS82Msg - SetMux Command [*0014]. 05/05/06 10:17:06.57 [0B98] SendSS82Msg - SetMux Command [*0024]. 05/05/06 10:17:06.57 [0E14] SendSS82Msg - SetMux Command [*0015]. 05/05/06 10:17:06.57 [0E14] SendSS82Msg - SetMux Command [*0025]. The previous was the result of Channels 1 & 4 on on Output1, where a function turns off Channel 1, Output 1 and leaves Channel 4, Output 1 on. Thirty seconds later it turns channel 1 back on. Even though the function calls for channel 4 to be on in both Update Switcher actions, you won't see any data for channel 4 because it's state doesn't change... 05/05/06 15:29:00.41 [0E14] SendSS82Msg - SetMux Command [*0016]. 05/05/06 15:29:30.41 [0B98] SendSS82Msg - SetMux Command [*0014].