Problem while running an old version of tool in XCMS workflow

Hi there,
As we say in French "Le cordonnier est souvent le plus mal chaussé", so here I am on 31st of December. While performing some final migration from old to new W4M instance, I ran into a problem with one of my job:
It works just fine with the latest version of xcms_process_history so this is no major issue in my case, but still I am reporting it here since this means something may have been missed during the installation process for this tool version..
If you need further information, do not hesitate to ask.