Windows 7 x64 - Strange problem

Hello everyone

I am having a very strange problem with Windows 7 x64.

I need to use a sort of mathematical software that was developed in Fortran and it is 32 bits. The program runs okay and gives good results. But after some time, the program works normally but instead of the previous results it starts to give me just 0 (zeros) even if i perform the same calculation than before.

The fortran program uses an input file for data and produces an output file for results.

1) If the program keeps running for a long period (for example 2 days in a row), everything works okay and results are okay.
2) The problem only appears after the program not being run for some period of time.
3) The only way to make the program work as before is a) by performing a System Restore to a previous state b) by applying Windows Updates and restarting. The problem mention in 2) still happens after 3) and the problem mention in 2) still happens after 1) also.

As an ending notes:
note1): just restarting the machine doesn't solve the problem
note2): This problem apparently doesn't happen if Windows 7 is running in Safe Mode.
note3): I have disabled all the services/startup programs to match those that are enabled in Safe Mode and the problem still happens.

I have been working with this same program for almost 2 years in Windows 7 x86 without any problem of this sort.

Any ideas? Many thanks.

Regards
Carlos Couto

Hello

Thank you. Yes i have tried that already and it didn't work. Also running in XP Mode is not an option due to performance issues.

Regards
Carlos

I'd have to agree with the dancing penguin (that GIF is simply hypnotising...). It seems that although a vast amount of 32-bit executables can run under 64-bit operating systems without issue, this is not one of them. Is it an independently, or non-mainstream application? If so, and I'll sound incredibly negative saying this, you just may not have any luck getting it to run successfully under 7-64.

You might try running a 32-bit virtual machine but even this may not give you a guaranteed result.

Thank you both for your replies.

In fact I am able to run the software in windows 7 64 bits without "any" problem, but something is happening that is causing the program to stop working and I need to do a system restore in order to get it work again (or a windows udpate will solve the problem too).

However, I have noticed that the program stops working after a period where i am away from the computer (for exemple during the night, or during the lunch). I have tried deactivating antivirus but it didn't solve my problem.

At this moment, I have also disabled all the "energy saving" options like turning off the harddrive and i am hoping that this is the source of the problem. If it works, I guess there is a very strange explanation on this subject.

By the way, that dancing penguim is hilarious!

Regards
Carlos

It didn't work...
Still not able to solve the problem...

Regards
Carlos