Sudden "File access permission denied."

[Thosch]

Hi all!

I use the .ini-Toolbox to save measurement data together with the related settings. To limit the size of the files, every hour a new file is generated. Everything works very well, BUT, after 30-35 hours, the Ini_WriteToFile function returns me an -95 "File access permission denied." error. The file seems not to be opened, because I can open him with a editor.

Any ideas out there?

It's pretty hard to figure out what's wrong because I always have to wait 30-35 hours until the error occurs.

[MelanieE]

Hi Thosch,

could you try to create new folders for the files let's say every day and watch, if this happens again.

Best regards,

Melanie

[Thosch]

Ok, good idea. I try it out and let you know.

Best,

Thomas

[Thosch]

Hi Melanie,

I found the reason, but unfortunately not the error. Not yet 😉

The variable who holds the file name of the active file gets corrupted. This is the reason for the Access denied error. It's a bit misleading.

So, I try to find out who is changing the variable.

Best,

Thomas

[Thosch]

Arghh, It's a good old buffer overflow. I forgot the range checking of a data array.

Best,

Thomas