DataSubscriber error

[BLFTech]

When I add the DataSubscriber to a form with a valid tag and then run the app I get the error I attached in the picture. It appears that it cannot subscribe to the tag for some reason. Not sure what the problem is.

[Archie]

This is a problem I still have to work out. It tries to send the value back to the form before the handle is created. It is only a problem on some computers. So far I have not been able to replicate it on my PC which has been making it difficult to fix.

[BLFTech]

I am running it on an Intel I7-2600, running Windows 7, 64 bit.

[Archie]

I've been testing everything on an Intel i7-2720QM, Win7 64 bit, so I'm not sure if it speed related, software, or even possibly Visual Studio since I am still developing on VS2010 with .NET framework 4.5

[BLFTech]

I have tested this on two different computers with the same error. Have you made any progress on what is causing this error?

[Archie]

I tried a few different things with it. I'll be posting version 3.58 tonight with the changes I made.

[BLFTech]

I tried version 3.58 with the same results. Anything I can check on my system?

[Archie]

Try to comment out this one line of code:

Code: [Select]

    Protected Overridable Sub OnSuccessfulSubscription(ByVal e As MfgControl.AdvancedHMI.Drivers.Common.PlcComEventArgs)
        RaiseEvent SuccessfulSubscription(Me, e)
    End Sub


[BLFTech]

I tried commenting out the code and the same error message appears. I can continue on and it will work. It appears that the subscription is happening prior to the form being created.

[Archie]

I think I found the problem. When the IPAddress is set, it tries to subscribe, which in turn makes it try to read from the PLC before the MainForm is initialized. I implemented ISupportInitialize to avoid subscribing until the fill application is initialized. I will send you an update later this evening to try out.