Replace file content

[SeppR]

Hi,

i want to read a serial number from a text file, increment it and then save it again.
And this with low level file I/O.

How could I implement this?

[ZYOng]

The shipping example is a good starting point.

C:\Program Files (x86)\National Instruments\LabVIEW 20xx\examples\File IO\Text (ASCII)

[altenbach]

You can set the size to zero to clear the file before writing.

If the serial number always has the same count of characters, you could just set the file position to the beginning before writing and thus overwrite it.