I have just created a new El Capitan Base Image (10.11.4), but Casper Imaging simply "quits" or crashes when I click the Image button. This is while running off our netboot server running 10.11.3, and it only happens when I choose a configuration that includes this ElCap base image. Everything appears to work fine when choosing a Yosemite configuration (although the hardware we are currently imaging will only boot with El Capitan, so not sure of the final result).
I have tried using a configuration with base image and our common applications, as well as a configuration that ONLY contains the base image. The result is the same: click on "Image" and Casper Imaging just quits/crashes with no error messages or feedback. I'm stumped, and would love any tips or suggestions.