Typo in command: rhc app create -a hellworldmdb -t jbosseap-6 Other commands reference application name "helloworldmdb".
Oops! Fixed in commit: https://github.com/jboss-developer/jboss-eap-quickstarts/commit/5f91ad0b5bff25f1a2164d713541fcbb83fd3bb7
This should be fixed in the current release.
Verified with EAP 6.3.0 DR1