Create callback event bug

I've changed my label positions to left for controls and right for indicators for a more compact and sleek look.
BUG:
When creating a callback event-vi, the Variant-label is placed to the right, albeit being a control ...
In other circumstances this happens if i by mistake place a control when i want in indicator and then switch to the other type, the label doesn't change (also a bug that it doesn't?)
Is this what's happening in the script somehow?
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

It looks like your code is looking for a TypeDef called CtlRef. I don't know if this is part of the IMAQdx spec, or something you need to provide, but providing it should get rid of the broken arrow.

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Create Callback VI for IMAQdx Event - Broken Wire

My application is using IMAQdx to communicate with a Basler camera. When my camera is triggered with a digital trigger, it sends out an event when exposre finishes. I can use this event to know when to grab an image.
I have a working VI that uses an event structure to handle this event and pull the image. Using an event structure in my main application will not work for my arcitecture, though, so I need to do a callback VI upon event generation.
I have been trying everything to get a callback VI to work, but it seems LabVIEW thinks that the callback VI doesn't match the input to the "Register Event Callback." I have tried everything ranging from making my own VI to match the exact inputs to just using "Create Callback VI" by right-clicking. No matter what I do to the VI, there is a broken wire.
See attached VI's. The callback VI is unnecessary because it is just a blank VI that was generated.
Any help with this would be highly appreciated!
Thank you,
James
James
LabVIEW Professional 2014
Attachments:
Callback VI.vi ‏8 KB
Initialize Camera Triggering.vi ‏24 KB

It looks like your code is looking for a TypeDef called CtlRef. I don't know if this is part of the IMAQdx spec, or something you need to provide, but providing it should get rid of the broken arrow.

Event Handler/Create User Event bug

This is a problem I've run into a few times on my system (Win2k) so I finally went back and reproduced it step by step since it wasn't too hard. It causes LabVIEW to crash and exit without saving.
- Create an Event Handler
- Place 'Register Events', wire output to dynamic event terminal
- Place 'Create User Event', wire output to 'Register Events'/User Event
- Place an Empty String Constant [""], wire to input of 'Create User Event'
- Set empty string property -> Visible Items > Label = True
- Rename label from "Empty String Constant" to other such as "Event"
OR
- Create a cluster constant with something in it
OR
- Place a boolean constant
- Set boolean property -> Visible Items > Label = True
- Name label something su
ch as "Event"
- 'Add Event Case...' to the Event Handler, select Dynamic / : User Event
- Delete the constant wired to 'Create User Event'.
- Place a constant of a different data type and wire it to the input of 'Create User Event'
LabVIEW immediately disappears (all changes are lost) and this error is displayed:
================================
LabVIEW.exe has generated errors and will be closed by
Windows. You wlil need to restart the program.
An error log is being created.
================================
If there is a more appropriate place to post things of this nature that don’t really add to the discussion group, but need to be brought to the attention of NI, please post a URL or submittal method. Thanks...

Thanks for the detailed request. We are aware of this exact issue, and the problem was actually fixed for LabVIEW 7.0 for Mac/Unix. Unfortunately, it did not get fixed for the initial release of LabVIEW 7.0 for Windows, but we have plans to include the fix in the first LabVIEW patch for 7.0.
Also, the Discussion Forum is great for notifications of this kind. For future reference, you also have the options of emailing NI engineers directly, or calling us with suspected bug fixes, if you would like more direct communication.
Thanks again, and have a great day!
Liz Fausak
Applications Engineer
National Instruments
www.ni.com/support

PSV2: create Business Event: sort infotypes by Seq.No. instead of IT No.

When I create new BE (in trx. PSV2), the section 'Further Information' in the bottom of the screen shows the list of infotypes sorted ascending by IT numbers.
Is there any possibility to change the sorting order?
For example, can we display the the list of infotypes sorted ascending by the Sequential Number, which is the 3rd column in the view "Actions (Individual Maintenance)" for Action E "Create Business Event" in SPRO->Training&Events->Basic Settings->Dialog Control->Current Settings->Maintain Personnel Actions (trx. OOMT)?
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Thanks to pasting the schema above, I found the bug.
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
     targetNamespace="http://www.xxx.co.uk/2009/ContactEventPropertySchema"
     elementFormDefault="qualified">
should be
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
     targetNamespace="http://www.xxx.co.uk/xsd/event/contact/properties"
     elementFormDefault="qualified">
Never the less, it's still kind of odd that it produces two different results for found/not found...
Edited by: reynaudj on Oct 26, 2009 1:51 PM
Added concluding comment.

Problems creating callback VI

Hi,
I stumbled over some strange behavior....
I tried to register a TestStand ActiveX callbacks, but I'm facing multiple problems:
My first attempt for assigning the callback VI was the right-click "Create Callback VI" which brings then up a template VI which in my case reports the following errors:
Albeit, both typedefs are considered ok (at least) for all the rest of this application....
So I manually deleted the "broken" controls and replaced them with the typedef'ed one and wired them up to the connector block.
The problem comes up at runtime: the Register for callback node returns Error 97: LabVIEW: A null or previously deleted refnum was passed in as an input.
What am I doing wrong?
Cheers
Oli
Programming languages don't create bad code, programmers create bad code....
Solved!
Go to Solution.

Hi Norbert,
thanks for the quick reply. Please find attached some scrrenshots:
Typedef for UserEvent
Typedef for UserEvent data
Frontpanel of automatically created callback VI
Frontpanel of modified callback VI (Error97)
The typedefs reside within the same lvlib as the caller. The callback VIs are reentrant. They are also marked private within the library, changing the access scope to public did not change the behaviour.
Do you think http://forums.ni.com/t5/LabVIEW/Register-Event-Callback-problem-with-Linkam-ActiveX-controls/td-p/15... could be related?
BTW using LV2012SP1 ans TS 2012SP1
Cheers
Oli
Programming languages don't create bad code, programmers create bad code....

Can't create new events or todos

I am a frequent iCal / Mac user and have been using my Mac for the last year with no problem.
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I sync my calendar to MobileMe and my phone and those are both fine - and I've added new things to them since iCal stopped working apparently (guessing it was about a week ago based on things missing from iCal). I'm confused by your comment about backing up iCal - won't that simply end up restoring the same inaccurate data? Or maybe in my case it doesn't matter because the next time I sync it will update with the data I have on my phone and MobileMe (so maybe a dumb question). I already use Time Capsule so I'm guessing I can just use my most recent Time Capsule/iCal file backup to do my restore?
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Problem creating iCal Events from Mail in Leopard

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Error while creating a Event in Table maintanence gen

Hi,
I've created a table maintanence gen every thing worked fine...i wanted to create a event 05 at new entries in my table main gen so i did it and wrote a subroutine inside it without any logic since i thougt of doing it later and just saved it and came out out the event creation......Now when i want to go to same even the its pops up a Information error which says 'Function group zxyz cannot be processed.' I cant open any thing from the main menu of the screen...like from environment or from utilities...for every thing it pops up the same message....is it bcoz of the event which i've just created......if i still want to delete it...its not allowing me to go into the event again..how to do it guys...suggest me
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How do I create an Event Handler for an Execute SQL Task in SSIS if its result set is empty

So the precedence on my entire package executing is based on my first SELECT of my Table and an updatable column. If that SELECT results in an empty result set, how do I create an Event Handler to handle an empty result set?
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Abhinav http://bishtabhinav.wordpress.com/

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Hi Experts,
i have a requirement like as follows:
The following triggers for Batch Jobs in the SCM system will be created.i.
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Error -32810 occurred at The FieldPoint server initialization failed. Possible causes: 1. Missing or corrupt configuration file; 2. Failed to create callbacks. : FP Open.vi

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Reward it, if u feel helpful.

I can no longer create an event on iCal by double clicking on a time or date, nor can I double click on an existing event! HELP!

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Create callback event bug

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