Automation interface for specified class cannot be obtained

I am trying to use a TestStand UI Expression Edit Control in LabVIEW to undertake an Expression.Evaluation, but I feel I must be missing something. I have a TestStand UI ExpressionEdit Control on the LabVIEW front panel, and when i try to evaluate it, or anything else (properties or methods) for that matter, the error is always the same:
"Automation Interface for the specified class cannot be obtained. Check if the automation refnum type is the correct class for this operation" Error Code 3008; User defined error code.
Any help tips or pointers would be appreciated.

Hi
To help resolve this issue can you post the VI which gives you this error.
Regards
Anand Jain
National Instruments.

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Hi there,
I'm new to Java as you'll see from the question.
I created a class "Bicycle" and then went on to create an interface for it "InterBicycle" only I get the following error:
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Hey, thank you for that petes.
Silly mistake on my part, I was just reading about Inheritance and then went on to reading about Interfaces.
Changing this I came up with another error for each of the methods implemented by Bicycle.java:
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package bicycle;
class Bicycle implements InterBicycle {
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A more successful experiment in creating compositable user interfaces for Config Dialogs

A couple weeks ago I posted an experiment in creating compositable user interfaces using transparent subpanels. The approach might best be described as, "It at least was notable for being novel."
Today, I'm posting another attempt, this one along more traditional lines, and far more successful. Particularly notable: this one can do all the arbitrary composition of the last one AND it solves the TAB order problem.
This solution uses a picture control and renders N copies of a control. When the user tabs to a control or moves the mouse over the control, a real control slides into that position to be able to catch the events (update mouse over draw state, highlight for keyboard focus, handle typing, etc). When the Value Change occurs, a master array of data is updated and the picture control is updated.
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it handles the TAB problem without flickering, something I haven't seen in other attemps
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I'm turning my attention away from this project for now... coding in G is lots of fun, and I wish I could spend more days doing it, but this has been a side project and it's time to get back to my assigned projects in text programming. Building a powerful platform for automatic UI generation in LabVIEW would be really useful -- I see lots of requests for this sort of thing, and other languages are pulling ahead of us in this domain.
[UPDATE 5/17/2012 - There is an improved version.]
Solved!
Go to Solution.
Attachments:
ConfighThroughCtrlCreation.zip ‏558 KB

Elijah K wrote:
Thanks for posting this Aristos. I would normally be one of those to go bug you at your desk, but in case I'm not the only one with this question... which particular flickering problem are you referring to? The act of switching tabs? In all honesty, I've never noticed...
When you move controls around on the screen, normally you try to Defer Panel Updates while you do that. But Defer Panel Updates has an effect on control's abilities to catch certain mouse clicks, so when you're trying to move a control to catch the mouse, you have to work a lot without Defer Panel Updates, so if you're adjusting captions, etc, to match the new location, you can see flicker as properties adjust. You can move the control off-screen, as long as you have already updated the picture control to reflect the changes. It took a while to catch all the ways that the flickering can crop up. I think I got 'em all.
Attached are the VIs saved for LV 2009. Actually, they're saved for LV 8.6, but it doesn't work in 8.6 because of a bug in the picture control that existed back then.
Attachments:
ComposableUI_LV2009.zip ‏391 KB

How to create an interface if the class has a nested class

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Any help is appreciated,
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Your response sounds sensible to me. Thanks.
Part of any piece of software will be about behavior.
Part will be about data. Face it, a lot of what
software does is move data around. IMHO, at boundaries
between layers or modules (e.g. the DTO/DAO/VO for
moving data between a database and your program), or
wherever conversion occurs (to/from XML for instance)
you may need some getters and setters.I agree.
I try to avoid get/set in my code, but if I find I'm
writing a whole bunch of goop just to achieve that
grail, I stop and think about whether concealing that
particular object's state really needs to be
sacrosanct. And when I do provide access to that data,
it's not just blind get/set that sets or returns any
and all fields directly.This is helpful. It makes me think that there may be alternative means of achieving the same end without directly calling "set" on a field. Interesting.
Off the top of my head, if
you're doing a lot of passing objects as parameters to
methods that just call getters and setters and act on
the results, as opposed to saying
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Using my example in the first post, I could modify it and say...
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An error occurred while releasing interface Loopback Pseudo-Interface 1 : The system cannot find the file specified

Hello All
I have TMG server installed on windows 2008 R2 64x with 3 network adaptor (Lan,Premiter and External), but for some reason the clients on premiter Network cant get ip addresses from dhcp which located on LAN. i have done
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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

LMS 3.2 syntax for specifying an interface for packet capture

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This is the third time someone asked something like this today:
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Can I convert a proxy for a class that does not has any interfaces?

Can I convert a proxy for a class that does not has any interfaces?

Hi.
I can hardly understand your question: what do you want your proxy (what kind of proxy?) to be converted into?
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Bye.

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Automation interface for specified class cannot be obtained

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