You have to be more precise. It's not clear which document class you are using. If it is a non standard class, attach it to your next post or give a link where to find it. Obviously you include a package that is also a non standard one. Do the same with this package file as with the class. Put them together in a ZIP archive. I believe to know where this warning comes from but I have to examine both files.
The jalchap package (jalchap.sty) includes the directory name "style-filer" in its \ProvidesPackage line, so you have to put the package in a directory with the same name to get rid of the warning. The package names given in \usepackage and the one in \ProvidesPackage have to be the same. (This is not good style, though, since LaTeX package names are generally directory-agnostic and are treated as such by the kpathsearch library.)
Hi Phi, thanks for your reply
Maybe its me being a bit slow, but what do i physically have to do?
Do i have to create a new folder thats called "style-filer" or "jalchap" and then move the .sty file there?
Or do i have to include the line /ProvidesPackage in my Preamble?
I am rather new to LaTeX
dannyjor wrote:[…] Do i have to create a new folder thats called "style-filer" or "jalchap" and then move the .sty file there? […]
Actually phi described very good what you have to do. Create a subdirectory called style-filer and move the file there. Alternatively you can edit the jalchap.sty file and search the following line(s).