[So, I expect your 32-buit code will compile but whether it runs as before will need some research.[/QUOTE]

Hi, yes in fact the code does compile successfully - the problem arises when executing the program and trying to read in data files: segmentation fault. I have checked and the sizeof() operator returns the same value for all variable types on both the 32-bit and 64-bit linux platforms. Is there some declaration that I can implement...

It's a 64-bit Linux OS...

Hi, not sure if this topic has already been addressed elsewhere (sorry but I haven't checked) but I have a source code that compiles and runs fine on my 32-bit linux platform, however, I now need to get it working on a new 64-bit OS. The code is quite long and has around 20 subroutines so rather than posting fragments of the code here (not yet anyway) I was just hoping to get some general advice on converting source code from 32-bit to 64-bit: things...

Hi, not sure if this topic has already been addressed elsewhere (sorry but I haven't checked) but I have a source code that complies and runs fine on my 32-bit linux platform, however, I now need to get it working on a new 64-bit OS. The code is quite long and has around 20 subroutines so rather than posting fragments of the code here (not yet anyway) I was just hoping to get some general advice on converting source code from 32-bit to 64-bit: things...