Thank you Charlie,

I have now access to their environment, they move to VMware and the VM shows two processors, OS is still Win2000.
I read the whole tread on markwilson.co.uk blog and found the vaffinity.exe recomended at the very end of it, downloaded and copied into the customer's environement but it runs and closes too fast and can't see what it is doing (or not), after trying five times I went to search for vaffinity.dll and did not find it, looks like the installer did not work well.

I can try "Alex" manual install but, in the meantime, may you explain what does the program do? is there a configuration needed?
Or it just installs and autodetect DOS programs and "tames" them?

Max

>I don't know if the issue is related to a new OS or multicore processors. If it's multiproccesor machine you may need this:
>http://sisgarbe.dyndns.org/sispub/WebShared/NTVDM/VAffinity.exe
>as described here:
>http://www.markwilson.co.uk/blog/2005/01/troubleshooting-ms-dos-application.htm
>This works for me.
>
>>Hi All
>>
>>At a customer office they recently moved to Win2003 from Win2000 and they are having big issues with their main app which is written in FoxPro DOS 2.5 ( !! yes, I know...), and uses the old method of keyboard polling (do while, get, readkey())
>>The CPU usage when running the DOS app is killing their Citrix servers.
>>
>>I do remember there were some way sto control the amount of CPU used in the PIF in Winframe and there are some utilities for DOS as the DOSKBD but memory is fading and I'm not sure if there is anything specific (other than re-writting the app) for these cases.
>>
>>Any inmput is welcome,
>>
>>Max