EOF detection

[zundap1970]

Hi all,

I need to read a *.mat file converted in *.txt and use it as data source (palyback file).

I've done a trivial VI so to understand how works FILE I/O and is not clear how detect the EOF.

Basically my trivial example is made of following steps :

1) Open the source and destination files
2) in case of none error on both operation opend a while loop and reads from source and copy in destination
3) If the error code from read operation on source file is 4 (= EOF detected)  than close the while loop and close all files

Now, I'm not anble to close the while loop and inside the destination file I found concatenate data from source file. Seems that after the end of source file, I restart from the top.

Example :
source file contains 12 34 56 78 90 => destination file : 12 34 56 78 90 12 34 56 78 90

In attach the VI for 2016 version.

Thanks for any suggestion

[GerdW]

Hi zundap,

- always use shift registers for references!

- why do you need a loop when you read the whole input file at once?

- why do you close the output file in the loop and again after the loop?

- why don't you stop the loop with each error, not just error 4?

[GerdW · Accepted solution]

Hi zundap,

as soon as you wire a constant/value at count input of FileRead you will get your EOF error…