Returning a value from a VI that was called by reference

[george seifert]

What's the proper way to return a value (Boolean in this case) from a VI that was called by reference (with an invoke node)? I suppose using a global is possible, but I've more or less shuned them.

George

[crelf]

QUOTE(george seifert @ Feb 21 2008, 10:04 AM)

What's the proper way to return a value (Boolean in this case) from a VI that was called by reference (with an invoke node)? I suppose using a global is possible, but I've more or less shuned them.

If it's a strictly-typed call, just wire it out, if it's not strictly-typed, you can get a referece to the FP node (and its' value) by name using a VI reference method.

[Aristos Queue]

The queues and notifiers are the tools explicitly designed for this sort of communication. You can acquire a named queue in both VIs and have one wait for the other to enqueue the data (similar for notifier).

[george seifert]

Thanks a lot for the suggestions.

George

[Norm Kirchner]

Please look into LVx

http://forums.lavag.org/LVx-Exported-LV-Fu...lity-t9437.html

This merges both what AQ is talking about and the flexibilty of LVOOP.

For your situation, you'll have a chid of the LVx object with the needed return datatype be the data type inside of the object.

When you send the command to your client VI to return the value, it will populate the object passed to it with the data and pass it back to the other VI where you can pull it out of the object.

There is a example of this in it's demo

-Norm

[george seifert]

QUOTE(Norm Kirchner @ Feb 21 2008, 02:00 PM)

Please look into LVx

http://forums.lavag.org/LVx-Exported-LV-Fu...lity-t9437.html

This merges both what AQ is talking about and the flexibilty of LVOOP.

-Norm

I haven't been brave enough to venture into LVOOP yet. I suppose I should one of these days.

[Norm Kirchner]

Well this will give you the ability to see a very elegant yet simple enough to toy with and implement solution.

[Tomi Maila]

QUOTE(george seifert @ Feb 21 2008, 05:04 PM)

What's the proper way to return a value (Boolean in this case) from a VI that was called by reference (with an invoke node)? I suppose using a global is possible, but I've more or less shuned them.

You may want to check out the new http://expressionflow.com/2008/02/29/active-vi-toolkit-public-alpha/' target="_blank">ExpressionFlow Active VI Toolkit... (alert: it's at alpha stage)

[george seifert]

QUOTE(Tomi Maila @ Feb 29 2008, 11:39 AM)

You may want to check out the new http://expressionflow.com/2008/02/29/active-vi-toolkit-public-alpha/' target="_blank">ExpressionFlow Active VI Toolkit... (alert: it's at alpha stage)

Thanks. It looks very interesting.

George