Dear All, I have a problem with a seek on a mbox file (thunderbird) After open the file (size 3764088424 byte) without error with hfile = Open mbox For Input I have seek with: Seek #hfile, SeekPoint where SeekPoint is a Long with value 3687556402, gambas stop and return error "Bad argument" system is ubuntu 12.04 32 bit gambas is 3.6.2 from repository Regards