The manufacturing tool includes a pre-built binary "u-boot.vybrid" (stored in Profiles/Vybrid Update/OS Firmware). Using this binary, the Mfg Tool works as expected with the VF610 Tower board. However, following the build instructions in U-boot_src/README.txt does not produce a correctly working u-boot.imx = u-boot.vybrid. We are having to use GCC V6 as V3 seems to be unavailable. I have spent over a week tweaking the U-boot source to make it build and stop it crashing (eg. adding "no-unaligned-access" to some files), but there are still issues. The attached is the serial output log from U-boot running in RAM on the vf610 Tower board. The overall aim is to get the Mfg Tool working on our own vf311-based board.