RPC Server Unavailable in simple DA client - by: janderscu

Hi, I am using QuickOPC 2020.2 Build 451.1 in a simple C# client that is subscribing to a DA server and monitoring data changes using the EasyDAItemChangedEventHandler. This client has been working fine on other machines and servers but running into an issue on a machine now where I get an exception in the DataChanged event with message: "RPC Server is unavailable" I know there are multiple sources for this error. I have turned off firewalls, etc based on reading I have done online on the subject. I do have other commercial clients I use for debugging that are not having this issue, they are able to find the server and subscribe to items fine. I can post code if needed. I appreciate any info to help debug this.

Thanks for the help.


Code to get exception:
static Exception GetException(EasyDAItemChangedEventArgs e_DA)
{
if (e_DA != null) return e_DA.Exception;
else return null;
}