The org.codehaus.mojo:javancss-maven-plugin:2.2-SNAPSHOT still uses Version 33.54 of javancss.
Commit 4a34312 "Use Commons CLI for the command line parsing" switched the parsing to Apache commons cli and is introduced with the not yet released version 34.55-SNAPSHOT.
But using this in the latest snapshot breaks the invocation.
The execution fails, missing a file "javancss-raw-report.xml". The Problem here is, that the maven plugin passes this as argument to the parameter out as an argument for the file write the result to, but javancss interprets this as another file to parse, and promptly misses it.
The PR attached will fix this.