Open Visa Ressource

[Armando1223]

Hi everyone,

I am trying to open a visa ressource to communicate with a device with GPIB bus. I am using the function viOpen and I wrote this : 

viOpen (ketlhey, GPIB1()::27::INSTR , VI_NULL, VI_NULL, 0);  (my device's adress is 27).

I don't understand why this does not compile, i get the error:  "31, 27 error: called object type 'int' is not a function or function pointer".

Can you help me please ? 

Thanks a lot ! 

[Wolfgang · Accepted solution]

Hi,

I see two problems, first it probably should read "GPIB1()::27::INSTR", second the last parameter cannot be zero, it is a parameter that is returned by viOpen, so it should be something like &instr

You can use the built-in help to learn more about the function parameters