1004: .... duplicate symbol .... 
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 1004: filename(modulename)> : '<symbol>' duplicated in 
 <filename(modulename)> 

  or

 1004: DEFINE command : '<symbol>' duplicated in 
 <filename(modulename)> 

  This message indicates that the symbol <symbol> defined as public in the
  first module or a DEFINE command is also defined as public in the second
  module.

  This will occur if two procedures in separate .OBJ or .LIB files have
  the same name.  The first one found is the one which is linked into the
  program, and the second one is ignored.