I've checked out the current-as-of-now (Oct 27) master branch for jbpm-designer and tried to build it, however, it fails with the CreateProcess 206 error (filename or path too long). In the past, I managed to work around this issue by mapping my Maven repository to a single drive (M:), however, now it seems that the classpath has become so bloated that this is no longer sufficient.
Would it be possible for the build process to create a single jar with a Manifest file that contains the classpath and reference that it in the build? That would fix the Windows build problem once and for all. I'd do it myself, but I am not that proficient with Maven and wouldn't want to break something in the build process by mistake.