@AMIGAZ
Run ShowPatches (you might also download FD files if not present in original archive) to see what system functions are patched. Maybe something is patched twice.
The best idea is to disable all the patches in MCP settings (just leave the commodities enabled) and then enable patches one by one to see which one is problematic. If I am correct, the "Test" button doesn't work as expected in MCP settings so you have to always save your settings and restart MCP or better the whole system to apply the changes.
@Laser
Excellent attitude Laser! I suppose you already posted a lot of bugreports to the current developer of MCP, right? :pissed: