Thanks for your answer.

Did Submix and Free and Matrix. No change in the SWP assignment. As I said, signal will pass through to the proper HW channel, but I can't control it with the SWP fader unless I can assign the send.

Thanks again.

Tried everything suggested. Tried saving the Workspace that does have all the Sends I need in SWP. When I change the channel layout, I lose a send assignment. And I keep losing them the more I change the channel layout. Doesn't matter what I try to keep changing the channel layout, I lose a send to the previous channel I showed. My other Workspaces I don't need to keep everything shown to get to keep my send assignments. Very strange.

I just want to be able to assign a send so I can use the SWP fader to adjust the gain going to my HW Outputs. Now I can't do it and I'm afraid to change any of my previous Workspaces in case I lose the send assignments there.

Thank you again for your reply.

I have 3 Workspaces. In two of them I can assign a Send from an ADAT Channel in SWP to an ADAT Channel in Hardware Output and can show or not show Channels in Hardware Output and it does not affect any of these Sends. For example, ADAT 1 in SWP Send to ADAT 2 in HW Output. I don't need to use Submix to do this, all I have to do is Left Click on the bottom of the fader in SWP and assign the Send. I want to be able to do the same in my third Workspace, but I can't.

I have found that, in my third Workspace, I can hide or show any Channels I want in Hardware Input and Software Playback, but to be able to assign Sends from ADAT Channels in SWP to ADAT Channels in Hardware Output, I have to show the other ADAT Channels. For example, ADAT 1, ADAT 3 and ADAT 5 are shown in SWP and I want to assign those three to ADAT 2, ADAT 4 and ADAT 6 respectively in HW Output. I can do that as long as ADAT 1, 3 and 5 are showing in HW Output. If I hide ADAT 5 in HWO, then the assignment to ADAT 6 goes away, and so on as I hide the odd numbered ADATs. That doesn't happen in my other two Workspaces. As I mentioned, I need the Sends assigned in SWP so I can use each ADAT Channel's fader in SWP to control the signal going to the ADAT Channel in HW Output.

Same issue with AES L in SWP to AES R in HWO. AES L has to be showing in HWO, otherwise the assignment won't show when I left Click the bottom of the AES L fader in SWP.

It's a workaround that works, but I'm not sure the workaround should be necessary.

Almost all my Hardware Outputs are Mono. The problem, as I mentioned, is, at least for this Workspace, I cannot make a Send from an AES or ADAT Channel in Software Playback to an AES or ADAT Channel in Hardware Output unless I show all the AES and ADAT Channels in Hardware Output, which I don't want to do. I'm only minimizing the AES and ADAT Channels in Hardware Output that I am not using, but need to have showing so I can Send to the Channels I am using.

I think I see what The Weed is talking about.

With my UCXII, if I have HW outputs ADAT 7 and ADAT 8 as separate mono outputs, hiding ADAT 7 also hides ADAT 8 from the routing menu. This happens with any mono outputs, so hiding Analog 1 also hides Analog 2, hiding AES L also hides AES R etc.

All the above issues have been fixed in TM FX 1.86. Beta 1 is now available as separate download:

[Edit: Links changed to release version)
https://www.rme-audio.de/downloads/tmfx_mac_186.zip

https://www.rme-audio.de/downloads/tmfx_win_186.zip

- Hidden output channels are shown in brackets within the routing menu

- In Submix mode selecting such an entry does nothing. In Free mode the routing is still possible.

- The button All in Layout Presets removes all brackets, so gives full access

- All the above works for mono and stereo output channels correctly

- Several smaller changes and improvements around this functionality (when changing sample rates, synchronisation with the Channel Layout dialog...)

- Windows: checkmark in the routing list is now better visible on 4k monitors

I changed the thread title to better reflect what this is about.