Create a prompt warning

[groogg]

How can I prompt a warning to the user when he/she writes an incorrect value in a "controller box". Another question is how do I create a start button for the whole script?

I guess these problems are easy to solve but I very new with using labview. I have tried the help file but it didn't help.

[altenbach]

There are several pre-made dialog boxes available from the time&dialog palette. Just wire the appropriate message and call them if needed.

A complete application always "runs", you can set it to "run when openend" in the VI properties. Now you just need a "wait for input" state that monitors a button to start the experiment. Have a look at the various state machine examples that ship with LabVIEW.

[groogg]

Thanks, I will try this.

[mikeporter]

Something else to consider is changing your user interface design to prevent the entry of incorrect data in the first place. It's always easier to prevent errors than catch them after they occur. What kind of data does the operator have to enter?

Mike...

[groogg]

The operator needs to enter a startvalue and an endvalue (interger) and the startvalue can not be greater or qual to the endvalue.

[altenbach]

You could just accept the values anyway, then let the program figure which one's bigger and thus supposed to be the end value.

Just feed the two inputs to min&max (comparison palette), then flip them in the controls as needed using local variables. (If they are equal, increment the end value by one!). Basically implement an autocorrect feature. It is not worth bothering the user with such details. 😉

Message Edited by altenbach on 07-13-2005 07:11 AM