Using script fails

I’m trying to copy/backup the eMMC of a BBB using the beaglebone-black-microSD-flasher-from-eMMC script in /op/scripts/tools/eMMC/ running the latest Debian image (BBB-eMMC-flasher-debian-7.6-lxde-4gb-armhf-2014-10-08-4gb).
We first flashed the mentioned image, then made some modifications (install samba, php, created some users, reconfigure apache…). Now we would like to duplicate this master-BBB to fresh BBBs. I think the mentioned script should do the task.
We tried to run it, there were many outputs in the terminal, but it stopped somewhere before finished. I have no specific errors at the moment. First I would like to ask, what the desired workflow would be to create a “master-sdcard” from our eMMC?! Are there any requirements to the SDcard? We are using 8GB card, so size should be no problem…
Maybe someone could help?
Thanks in advance

Please post the errors you saw.


Booth with eMMC
insert microSD
run script (btw, also run "git pull" as i push fixes to that repo)

microSD will now auto flash anything it is plugged into