3 NI-9871 modules on a single VI

[wingSs]

I get this error (Hex 0xBFFF0072) - The resource is valid, but VISA cannot currently access it,

 

[Kyle97330]

The most common reason to see that message is because a different program is either currently using the port, or reserved the port for use but didn't release it.  I don't suppose there's a chance that something on the cRIO is reserving it?  I wonder if just having the cRIO connected and ready to run VIs might reserve the ports, or something...

[wingSs]

I somehow managed two make two controllers work together with a VI that runs on "My Computer". 

It started working after adding my PC's IP on the cRIO controller (on NI MAX), but i guess it's just a coincidence because the "*" in the Remote Access List gives the access to everybody. I also checked my laptop in NI VISA --> Remote 

After a while one controller stopped working so i guess you are right, maybe the ports don't get released.

I tried to check this on the cRIO properties, will see if it makes some difference.