Exception in thread "main" java.lang.IllegalArgumentException: Missing scheme

Hi, whenever I try to load a Jar with this line in the manifest

Class-Path: featurecreep.jar

I get this error

Exception in thread "main" java.lang.IllegalArgumentException: Missing scheme

I am trying to Use JBoss Modules as a library for my program which loads jar files in a directory, and i need a way for these jar files to be able to access my Jar File which is the one that is also invoking JBoss Modules.