I had an issue where I was using NTLite and W7MUI at the same time (for different WIM files). NTLite unmounts every image when it's done (it doesn't outright say it, so you don't know until it happens), so that caused issues for W7MUI. I suggest giving a warning if anything else is using DISM to prevent conflicts.
I had an issue where I was using NTLite and W7MUI at the same time (for different WIM files). NTLite unmounts every image when it's done (it doesn't outright say it, so you don't know until it happens), so that caused issues for W7MUI. I suggest giving a warning if anything else is using DISM to prevent conflicts.