Hi all, Im experiencing an access violation problem when entering the electrical schematic design (le calepinage dans la version française :mrgreen:). access violation at adress 01030955 in module PVsyst6.exe. Read of adress 00000084. Ive tried to desactivate avast antivirus (in case of...) but dont resolve the problem my version is 6.6.0.24 Thx for your help,