🚀 go-pugleaf

In an earlier post someone recorded these commands to record a doom game to 
a lmp file...

The pertinent commands to do this are:
doom -wart [1-3] [1-9] -skill [1-4] -record [filename]
doom -playdemo [filename]
doom -nodraw -timedemo [filename]

Ex.
  doom -wart 1 1 -skill 4 -record demo1
  doom -playdemo demo1
  doom -nodraw -timedemo demo1
Demo files use a default extension of .lmp.  You don't need to include
an extension.

The first command line runs properly as I go directly into doom, but once I 
exit no file is created.  Am I to end at a certain point in the game?  do I 
have to save?  Is exiting the proper way to record the file?

Any help would be appreciated.

Thanks!
Rob