Frank,

I cannot reproduce it, but I suppose it's just a misunderstanding of the `BlockRead' semantics. If the 4th parameter is given, it doesn't have to read the whole buffer because the 4th parameter tells how many were read.

I always thought that forth parameter in 'BlockRead' contains information how much units was read. How much to read is controlled by the third parameter. Newertheless your code works fine - it just make one more loop on the eof. I'm still interest what prevent to fill the full buffer (512 bytes) on this magic poiner 16384. I've debugged this sample and found that with big files the second magic spot appears somewhere about 100773 filepos. But it's may vary. Thanks, Peter __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html