Hello, I'm desperate for banal storage.
Here is my code:

float N[12][60][12];
int filelength=60*12*12*4;
file_write("N.dat", N, filelength);

Seems to be right. But the file has only a size of 34 KB.

Does anyone have any idea what I'm doing wrong? Saving other files works!
Many thanks for your help

Forget it! Oh, dear, I got it!