Runtime Error Messages -- Clipper 5.01a
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 1   BASE/2016      Write error (COPY FILE command)
 2   BASE/2017      Argument error (AEVAL())
 3   BASE/2018      Open error (DISKSPACE())
 4   DBCMD/1010     Illegal characters in alias (USE command)
 5   DBCMD/1011     Alias already in use (USE command)
 6   DBCMD/1101     Syntax error (TOTAL ON command)
 7   DBCMD/2001     Work area not in use
 8   DBCMD/2018     Argument error (DBEVAL())
 9   DBFNTX/1201    Workarea not indexed (SEEK command)