Ok Decal works fine and Dual Client works fine. When ran seperate. When I try to use Dual Client and tell it to use Decal it starts it up and loads AC up fine, but Decal does not show up in game. How do I fix this?

ok I take that back Dual Client wont work now. Says I can run more than one client on the same machine.

Start off by posting a decal export. Make sure to include the "location" option in your export. That option is at the top of the export screen in decal.

 

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When you say that DC works fine, do you mean that you've been able to get 2 clients running at once, or do you simply mean that you can load 1 client with DC, after already opening decal?

I always start decal first, by right-clicking and choosing run as admin. Then I go into DC and open up whichever clients I want opened.

I haven't had any issues doing it this way.

Occasionally after a patch day I get the error you mentioned, but it's only because I didn't properly copy all the files from the patched directory to the other ones.