Newbie Question Thread

[Ra7eN]

OK, I am from the old BBS days (Myth, Paradigm etc..) and have been fascinated by extreme compression. These days I learn it as a hobby. So wanted to thank you all for this site.

Sorry I have a noob question.

I know this is part of an arc bat file (I love working with batch), however what is this part

-mprecomp+srep+lzma:a1:mfbt4:d256m:fb128:mc1000:lc8

Because when I run it,
arc a -lc8 -ep1 -ed -r -w.\ game-1.bin -mprecomp+srep+lzma:a1:mfbt4:d256m:fb128:mc1000:lc8 "D:\GAMES\my_game_file\*"

gives me an error
recent one was general (de)compression error in precomp
other times it looks like it skips both precomp and srep and just finishes susccessfully.

How am I using this incorrectly?

Thanks!