possible bug in newzmat (gaussian program utility)

[m10!frisch(-(at)-)uunet.UU.NET (Michael Frisch)]

 Dongchul Lim described giving the NEWZMAT utility in Gaussian an input
 file containing mixed internal and cartesian coordinates, requesting
 a MOPAC input deck, and getting something silly for the atom which
 was specified using cartesian coordinates in the original file.
 Normally, NewZMat generates its output file from cartesian coordinates
 generated from the input file, and thus how the molecule is specified
 (internal, cartesian, or mixed coordinates) doesn't matter.  However,
 for the special case of turning MOPAC into Gaussian input, or vice-versa,
 the default is for NewZMat to preserve the internal coordinates of
 the original file.  Unfortunetly, NewZMat doesn't correctly convert
 Gaussian cartesian coordinates in this case.  The work-around is to
 have NewZMat convert its input to pure cartesian and generate new
 internal coordinates for MOPAC from the cartesians:
 newzmat -omopac -redoz input-file output-file
 The -redoz flag instructs NewZMat to re-do the internal coordinates
 rather than preserving them.  This should be used whenever a
 Gaussian input file with mixed or cartesian coordinates is input
 and either a Gaussian or MOPAC file is the output.
 Mike Frisch