Tried to use DVD2VCD to convert a movie from avi to DVD. After following the guide in here I hit convert then 2 hours later it said it was finished except for one problem. An error occured

Executing DVDAuthor. Commandline:
"F:\Appz\DVD2SVCD\DVDAuthor\dvdauthor.exe" -x "F:\Appz\DVD2SVCD\DVDAuthor.xml"
DVDAuthor failed for unknown reasons!

DVD Authoring text
STAT: Processing F:\Appz\DVD2SVCD\MPlex_Muxed_File00.mpg...
ERR: Error opening F:\Appz\DVD2SVCD\MPlex_Muxed_File00.mpg: No such file or directory

What does this mean??