Problems with serial visa under windows XP

[gg09]

I used VISA to control serial (RS232) instruments under windows 2000 and it was working well.
Now I want to use the same program under Windows XP and I can't even open a VISA session, or use VISA Write. I get an error : the resource is available but VISA can't reach it.
What could be the problem ?

Thank you in advance for your help

[rolfk]

gg09 wrote:

> I used VISA to control serial (RS232) instruments under windows 2000
> and it was working well.
> Now I want to use the same program under Windows XP and I can't even
> open a VISA session, or use VISA Write. I get an error : the resource
> is available but VISA can't reach it.
> What could be the problem ?

Someone else is probably openening that COM port already. Possible
culprits: Configured Modems, UPS drivers, even Printer drivers although
serial printers are seldom nowadays. You will have to search your
Windows configuration for possible other applications reserving that
port for themself.

Rolf Kalbermatter

[Sanaa]

Hello,

You will find in the links bellow the solution for your problem :

http://digital.ni.com/public.nsf/websearch/936298454061FE5886256C2A0060B321?OpenDocument

http://digital.ni.com/public.nsf/websearch/862567530005F09C862564E000017E89?OpenDocument

Sanaa TAZI
Application Engineer
National Instruments