Error 128 - Open Connection TCP or UDP

[Rgouveia]

Hello,

Does anyone have a solution for this error?

I try to connect to some devices, but sometimes when some of the devices are off, i get this error 128, after tryng to open connection several times..

I am constantly trying to open a connection with the device and if there is no connection, I close the connection and after x seconds I try to open a connection with the device again.

After getting this error, my program is never able to reconnect, even when i try to close the connection.

I get this error even using same TCP or UDP connection.

It just works normally again after exiting and re-entering the program.

Using labview 2019.

[Rgouveia]

Hello,

Does anyone have a solution for this error?

I try to connect to some devices, but sometimes when some of the devices are off, i get this error 128.

I am constantly trying to open a connection with the device and if there is no connection, I close the connection and after x seconds I try to open a connection with the device again.

After getting this error, my program is never able to reconnect, even when i try to close the connection.

I get this error even using same TCP or UDP connection.

It just works normally again after exiting and re-entering the program.

Using labview 2019.

[Tanyifeng]

我开发Server时遇到过128错误，一般的处理方法是：关闭防火墙，检查端口是否释放彻底

[LLindenbauer]

Sounds like the connection is not closed properly. You can use the resource monitor to check if the connection is still up: https://superuser.com/questions/1025252/how-to-list-open-ports-and-application-using-them-in-windows

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@Rgouveia wrote:

... even using same TCP or UDP connection.

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That does vaguely sound like something you should not be doing. Do you have more details?