TC Disable no longer works on SDL after ECU upgrade to 3.5

[Apex Speed Tech]

I had an alarm that read "TC off" on my SDL via M800 Error Group 4. I use a bitmask of 01.

It worked flawlessly for a year. After updating to 3.5, the channel cycles between 1 and 0 constantly irrespective of what the switch is doing. I have confirmed it is working in the M800 software. Any ideas?

Regards,

-Neel

[IDP]

Strange,

I use the same method and it's currently working fine in V3.5 and SDL V1.60p