Hi SergioRM

I´ve once had a similar problem with MCS and WinXP and I decided to (for good) to get rid of WinXP and use Win2000 and it has been working like a Rolls Royce.

I remember also that for some reason MCS "forgot" where to put the files and the only way I found at that time was to open a window with the directory where I thought MCS whas doing the writings and watch the differents files beeing created by MCS.

I´ve found a weird thing also, if by any chance within MCS you use the "save as" with the file you are working like for instance myfile.??? to myfile_a.??? next time you compile the new file, it will erase the previous myfile.hex and you only see myfile_a.hex.

Sorry if my help is not much

Abraços