problems faced by me and possible pointers/solutions
missing resource folder add .gitkeep into your "resources" folder else empty folder it will not be committed and pushed with git repos
*** simulator session started with error: Error Domain=DTiPhoneSimulatorErrorDomain Code=1 "Unknown error." UserInfo=0x100512a70 {NSLocalizedDescription=Unknown error., DTiPhoneSimulatorUnderlyingErrorCodeKey=-1} rake aborted! Command failed with status (1): [ /Library/RubyMotion/bin/sim 2 1 5.0 "/Dev...]
no results on google yet, need to find a forum to post it possibly related to simulator, as similar error also found on Titanium
just discovered all apps that are crashing have additional dependency added in the rakefile
need to investigate further