This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
Happened to me too.
I think what solved it was to run the goal install on the parent project : the one with the pom.xml directly in the "ch-multi" folder.
I did it with eclipse, but it should work in command line as well.