How do I exit a while loop which has a 'read from spreadsheet' pop up in it?

I have a while loop which calls 'read from spreadsheet'. My problem is that after entering a filename the loop repeats too quickly for me to hit the end loop button. How do I exit the loop without adding a delay after the read thereby slowing the loop when I don't want to exit. If I select cancel I get 'error 43'. Is there a way to to use an error handler to prevent this from popping up and use it to end the loop?

It's the error handler inside Read From Spreadsheet that creates the message. Specifically, one of the VIs called is Read Lines From File. The last VI in there is General Error Handler. You can delete it and save it with a different name. You should also modify it to return the error cluster. You'll also want to modify Read From Spreadsheet to return the error cluster so that you can trap the error in your VI. When cancel is selected, error code 43 is generated. Stop the loop when you see 43.

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Hello,
I have an event handler structure within which i run a while loop for a particular event. I would like to interrupt the execution of this while loop as soon as another event occurs, even if the while loop has not finished execution. I have tried so many ways, the best i could get is exiting one itteration after the new event occurs which is no good for me.
Any suggestions???
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Me

Instead of having a task while loop in an event case, put your task while loop in parallel with the loop surrounding the event structure. When the event which should start the task occurs, you can signal the start of the task while loop. You could use local variables of references to start/stop the loop when an event occurs. You could also use notifiers instead of variables to pass signals to start/stop the while loop. In general you should have a while loop for the event structure, and a parallel while loop to do the tasks. The parallel loop is controlled by variables or notifiers which are set in the event cases.
- tbob
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I'm writing a program to grab image using a NI card. The application uses the Event structure. When the GRAB button was pressed, it snaps image continually by putting the SNAP function in a while loop. Is there some way to exit the while loop?(Note :The while loop was put in the GRAB IMAGE event response section.)

edit this event-case AND uncheck "lock front panel until the event case for this event completes".
BTW, your thanks should go to Ankita, <a href='http://forums.ni.com/ni/board/message?board.id=170&message.id=151282'>here</a>
cheers!
Message Edited by Dynamik on 11-13-2005 01:26 AM
Message Edited by Dynamik on 11-13-2005 01:38 AM
When they give imbeciles handicap-parking, I won't have so far to walk!
Attachments:
untitled.GIF ‏20 KB

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Hi All,
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How do I exit a while loop which has a 'read from spreadshee​t' pop up in it?

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How do I exit a while loop which has a 'read from spreadsheet' pop up in it?