option to continue with empty file path without saving

[steffi.kono]

Hi,

maybe some can help me: I have a program which runs without saving data, but the user has the option to save data (via a switch on the frontpanel). In this case the user is asked where to save the data because I left the path file empty. This works fine.

But sometimes the user hits the switch and then recognizes that he doesn't want to save data, so he hits "cancel" without entering a file path name. In this case LabVIEW gives an error (because the user didn't enter a file name) and you have to stop the whole program.

Does anybody know if there is an option to cancel the saving process once the user has hit the "save" button without stopping the whole program?

Thank you.

Steffi

[Jorge_Amaral]

hello,

If i'm my idea it's correct... If you wanna stop that in a simple process, you just have to connect an error indicator to the save vi. Because that error popup only cames out if you don't have nothing connected.

If the vi don't have this error connector, you've to change the vi. What's the vi name?

[GerdW]

Hi Stefi,

use the "file dialog" function to ask for a filename. Here you can check if the user has decided to cancel the save operation...

[steffi.kono]

Hi,

I have the "Write Characters To File.vi" to save my data in a spreadsheet file. So what shall I wire to the file path? I'm not sure which function you mean? Do you mean an Express-vi? Maybe you have a simple example...

There is no error in in that "Write Characters To File.vi".

Thank you very much,
Stefi

[Jorge_Amaral]

I'm using Labview 8.5, I can't see that function.

Please send me the function and tell me your labview version.

[GerdW]

Hi Steffi,

in the "Write Characters to File.vi" you will find a "General Error Handler" which is bringing up those messages...
You can make a copy of this function and change this copy by deleting the error handler. Then it will have the same functionality without showing error messages.

[steffi.kono]

I don't find the general error handler...

Maybe you can have a look (one more time)? I post the VI. I work with LabVIEW 7.1

Thanks.

[GerdW]

Hi Steffi,

oopen your vi, double-click "Write to text" or "Write to spreadsheet" - et voila...
Remember: always make copies before changing vi.lib-functions!

Hint: try to code according to style guide: left to right, straight wires

[Jorge_Amaral]

simply do like it's the attached picture. I can't send you an example in 7.1.

[steffi.kono]

Hi Gerd,

I'm sorry, I don't get it. If I double click the vi I have the front panel of the vi, right? But I can't find a general error handler in there?!
Or shall I write "Not a path" to the "new file path" box or the "file path" box?
You didn't change anything in your attached vi, or? At least I didn't find any difference...

Sorry and thank you very much for your help.
Steffi