Mining Solo LTC

Hey there!!
I am trying mining solo a new coin like LTC but i cant configurate the .bat files and the qt. My question is, any video device miner Scrypt, I have a rig mining with 12 devices RADEON RX 580.

Many times i tryied to create the bat file but when i ruin it, it appers and close

I need mining solo with the 12 video device but need be solo. Is it possible:

Thanks for all.

Why not run cmd.exe, then run the batch or executable from there. Then you can see the errors…