[quote user="Fabian Nenniger1"]Any hints why this problem occurs?[/quote]This might be the same problem as seen with CCS 5.5 and a RM42 - see CCS 5.5 flash verification failure for a RM42 image containing flash ECC.
With CCS 5.5 this was fixed in Hercules Emulation version 5.5.0.9.
Which version of Hercules Emulation does your CCS 5.4 installation use?