if no file is found, skip to the next step

[krispiekream]

hi, i have this loop..
it searches through the SN and search for serial numbers that are NOT -1.
going through that loop...
it willl look inside a directory, list the file names and search for any file that look like SN. for instant..i have SN 42245, if i have a file that is SN42245_8908_797.csv, it will find the latest file and read from that file.
but, if no file is found. my program pop up a window and tell me to search for the file manually.
how do i get rid of that?
if no file is found, go to the next step....
can someone give me a pointer?
thanks



Message Edited by krispiekream on 03-05-2008 04:02 PM

[krispiekream]

how do can i do it where if no file of SN is in my directory for search, Labview will automatically find NoConstants.txt in placement of that?
NoConstants.txt is an empty file (a dummy file)

[TobyD]

Try using the Path Type.vi and capturing the case where the output of Build Path.vi is <Not a Path>.

[krispiekream]

i think your method might work..
can you show me a diagram?

[krispiekream]

my code is causing an issue here...using the File/Directory Info, when no file is found, i want to ignore it and not have the pop up...
can someone please help me..a diagram would be greatly appreciated..

i dont know how to fix it because i really don't understand how this VI give out the error, and I dont have very well understanding of the simple error handler...

i was going through the forum and found this infomation that is useful
 

"To avoid the pop-ups all you need to do is wire the error cluster and handle the error. In this case, check the error number.
If it is an error you want to ignore, pass an empty error cluster on. If you don't want to ignore it, pass the original error cluster.""

thanks in advance..

[TobyD]

Try this one... I added a "Strip Path" so that you check the entire folder that your VI is in. Then I check the size of the array of filenames. If it is 0 then no matching file name was found and the default is loaded. There are many ways to accomplish this, but this one was quick and dirty and required only a couple changes to your code.

[krispiekream]

sorry, i forgot to tell you that i am working with labview 7.0
can you save it as previous version 7.0 or 8.0?
thanks

[TobyD]

I can't as I'm working on a machine that only has 8.2 right now. Perhaps someone else can jump in. If not, here is a screenshot that should show you what you need.

[krispiekream]

thank you..the picture will do..

[krispiekream]

WOWWWW!!!!
THAT DID THE JOB!!!
THANK YOU SO MUCH..
YOU ARE THE BEST!