[Pharo-users] image/vm mismatch on raspberry pi model 3

Hi, Having copied a viable pair of image+changes and its associated sources file to a pi 3, in the same directory as the directory from the zip file (from https://ci.inria.fr/pharo/view/RaspberryPi/job/RaspberryPi-Publish/ws/64.zip) containing the VM code for a rpi, on running ./PharoS Pharo6.1 I get the message "This interpreter (vers. 6505) cannot read image file (vers. 6521)." How does one ensure a match between VM and image+sources on raspberry pi ? I have also tried one image pair from an earlier version and get a similar message. thanks Greg