NI VISA error

[Cinou]

 What does-it mean?

[pincpanter]

I don't have complete information nor operational knowledge about NI-VISA Server, but AFAIK and can guess it is an application (maybe a service) that allows programs running on other LAN nodes to control instruments by means of VISA as if the instruments would be directly connected to the client PC. NI-VISA Server listens for client connections on TCP port 3573. But on your computer there is already a program or service that uses this port. Hence the error message. If you have installed VISA Server but don't want to use it, you may simply uninstall it.

[billko]

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@pincpanter wrote:

I don't have complete information nor operational knowledge about NI-VISA Server, but AFAIK and can guess it is an application (maybe a service) that allows programs running on other LAN nodes to control instruments by means of VISA as if the instruments would be directly connected to the client PC. NI-VISA Server listens for client connections on TCP port 3573. But on your computer there is already a program or service that uses this port. Hence the error message. If you have installed VISA Server but don't want to use it, you may simply uninstall it.

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Could it also be due to firewall blocking?

[santo_13]

@Bill, you're correct, it is a port used by NI-VISA and it must be open.

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000001DdxbSAC&l=en-US

https://www.ni.com/en/support/security/configuring-software-and-hardware-firewalls-to-support-nation...

[pincpanter]

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@billko  ha scritto:

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@pincpanter wrote:

I don't have complete information nor operational knowledge about NI-VISA Server, but AFAIK and can guess it is an application (maybe a service) that allows programs running on other LAN nodes to control instruments by means of VISA as if the instruments would be directly connected to the client PC. NI-VISA Server listens for client connections on TCP port 3573. But on your computer there is already a program or service that uses this port. Hence the error message. If you have installed VISA Server but don't want to use it, you may simply uninstall it.

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Could it also be due to firewall blocking?

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No, because applications know nothing about blocking. Actually, the firewall (nearly?) always blocks connection attempts coming from other nodes. Another program on the same machine would be able to connect.

[jamesbrownuk]

If you see an NI VISA error, first check the device connection and resource name. Make sure the right driver is installed and try updating it. Restart NI MAX and send *IDN? to test communication. If it still doesn’t work, share the error code for more help.