Just getting your 42 cameras to work (at ALL) is a very big first step, but a little more details on your rig (+ photo's) also would help.
And is your multi-camera built, by you, from scratch or partly bought second-hand. ??
I have a long story before I get here. But I'll tell everything in another time.
The whole project was done by myself. Without any help, just reading and learning in this forum. Many things were trial and error. I do not want to bother anyone.
I would like to share with you all the peculiarities of the project, with photos and everything, but first, I want to be 100% sure that works the way I expect.
And if not, your "42 cameras" what Canon model are they. ??
H-H
All the cameras I have are Canon PowerShot SX170 IS.
My guess is the devil is in the details regarding the "red wire SYNC USB-2 HACK".
Seriously, I'll try to understand what you're saying, if all other attempts fail, I'll look more closely until I understand that.
Edit #1 Also refer to the Multi-Camera post's regarding Rig Construction, USB-2 Wiring, Camera Power Supply etc.
I can tell you some little things about wiring that I learned from my project.
To start, usb 2.0 cables should only be used from the camera to the first hub, after it only usb 3.0 cables and usb 3.0 hubs. You gain more cable length and improve transmission quality. It sounds silly and wrong, but in practice, tested and approved.