I am trying to build executables on Windows 7 (64 bits) that are suitable for Windows XP (32 bits). To this end I use the 32-bits version of the Intel Fortran compiler and as far as I know this worked fine up to last week, but now, for reasons I do not understand, the executables I have been building of late, do not run on Windows XP. The error message is that the executable is not a valid Win32 application.
Does anyone have any idea what is causing this? Or better still, how I can solve this?