As my mac is updated with OS X 10.10.4, I am not able to upload to JSS "Install OS X Yosemite" image ver. 1.6.30 with Casper Admin. On the end of the upload process it shows an error "An exception of class NilObjectException was not handled. The application must shut down" - and there is no "Install OS X Yosemite.InstallESD.dmg".
Any recommendations, please?