ActiveX / Nanoscan - Invoke Nodes don't work

[steffenried]

Hi,

I'm trying to get the Nanoscan (Photon Inc.) to work via ActiveX. There is a sample vi (from LabView 6) included but that doesn't work. So I tried to write an own short vi with only 2 commands. But that doesn't work either.

Error -2147352561 is returned.

Please find the test.vi (LV2009) I used attached. Property Nodes work, Invoke Nodes don't.

Any help in this matter is greatly appreciated!

Regards,

Steffen

[RuedigerE]

Hi, 

that's a known problem. 
  

Have you tried creating new property nodes and reassigning the properties to see if this fixes the issue?

Regards

Rüdiger

[steffenried]

Hi Rüdiger, 

Thank you for your help. 

Yes I already tried that. I started with an empty vi and from there I added the components from the menu. But it didn't fix the problem. All Invoke Nodes don't work.

Do you have some more ideas?

Regards,

Steffen

[RuedigerE]

Hello Steffen,

could you contact the Nanoscan support in order to ask for a new version of the type library?

Regards

Rüdiger

[steffenried]

Hello Rüdiger,

I already contacted them. But they also have no clue why it isn't working. They know that it works with older Labview versions.

Regards,

Steffen

[esoterik]

Hello All,

The sample works with later versions of labview after all the invoke nodes have been deleted and re-added.

The error code -2147352561 is 8002000F in hex, which translates to an error of "parameter not optional," however in steffens .vi, he is trying to call a method with 0 parameters. The error makes no sense in this context, since the method has no parameters at all. This is the issue that we (at photon) don't understand: why are you getting a "parameter not optional" error on an invoke with zero parameters? The function in question, NsAsAquireSync1Rev(), has been tested and works without any problems in other activeX clients.

I wonder if anyone at NI knows why an invoke of a zero paremeter function, would result in a "parameter not optional" error.