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Thanks Litus,

I don't have a problem with the f77 side of things. It's more the migration from Unix to Windows I am concerned about. I don't actually know what this code is supposed to do so it's n ...

Sorry Paul, looking through my last post I realise that I wasn't too clear as to what my intentions were. FTN95 is very windows friendly and my compiler of choice; my problem is that while I have FTN9 ...

Hi Guys,

Since fixing my last problem (thanks for all the help on that one!) I have been given another legacy code. The code was written to be run on a unix system and is coded in f77.

I was wo ...

Hi Guys,
I think I have finally fixed my problem. Unfortunately, I made two changes at the same time and am not sure which one to attribute the success to.

When I changed the code initially I adde ...

Thanks for the replies guys, there's some very helpful information there.

I think I confused matters when I wrote
D=function(B,C)
by this I meant that D depends only upon the variables B ...

Hello again guys,

To try and resolve this issue I have removed the arrays entirely and am just using real variables. I still have the same problem although I am unsure why. It appears that a variab ...

Thanks Bruce, you're right I should have included the variables in the subroutine call and the subroutine declaration. In the real code I have made sure that the subroutine and the calling program are ...

Thanks for your reply John - I really appreciate you taking the time to respond to my rather lengthy post.

Unfortunately I still haven't resolved the issue. The code I am changing has been very wel ...

Hi Guys, I'm working on a CFD code my predecessor developed and it's written in fortran 77. I have a good amount of experience in fortran 90 but am having a few teething troubles with his code. If som ...

Thanks guys,
I've made sure that phi1, and phi2 are filled matrices, the errors I'm finding are very small 1e-16 etc. and i'm pretty sure they're just rounding errors.

My problem is that these err ...

Hello Guys,
I've been working on a rather complicated code for quite some time. Recently I noticed some rather strange behaviour in my results, however, and have been running tests to see if I can id ...

Thanks Paul,
I never knew that the DO index wasn't defined. I am perhaps too used to using Matlab where the FOR index is retained between loops.

Now that I know this I'll be more careful in future ...

Hi Guys,
I've been debugging a code now for several hours and have noticed something wierd (turns it out was the source of my error).

I have been using fortran on and off for several years now, I ...

Hi Guys,
I have no idea why - but the problem I was having yesterday seems to have solved itself. I haven't changed anything in my code but for some reason it's working properly now.... it is really ...

Hi Paul,

I have tried using checkmate and this didn't show up any errors. I have no idea why it's playing silly-buggers with me. The numerical wiggles are very small and so I suppose that I could i ...