set file position within a for loop, error 1

[AllDayBreakfast]

Hi, I'm reading from a .sxm file consisting of a large chunk of text followed by binary data for 512x512 images with 4 bytes per pixel

I’ve managed to successfully identify the start of the binary and read the first image from the file and view it using  "flatten pixmap.vi", so I’m doing something right, however when i try to read the next chunk of image data in the .sxm file using a for loop, set file position keeps churning out ERR (1).

im at a loss as to whats causing this

[AllDayBreakfast · Accepted solution]

 I closed the file in the loop, doh! ... another morning well spent