Hi,
If you press F2 to bring up the text window, this should show all commands since dwg has been opened. You will find that commands disappear off the top of the F2 text window after they reach a certain number of lines (I have no idea what that number is). In earlier versions (like R14) you could set the number of lines but now it doesn't appear to be possible, so what's gone off the top is lost forever.
Cheers!