Bruno, thank you for your answer, but actually my question was not well written. I have a MAC and I cannot install PVsyst and I don't want to use any virtual machine, also because all I need is to know the main value of the inverter (MPPT, Power, etc...), in other word I want to check if the OND is the right one, before sending it to the customer. I thought I could open it with a text editor, but it's not written in ascii. I hope now it's more clear, thank you in advance Roberto