Greetings!  J. Eric Stone made available an excellent molecular modeling and estimation program
called Molgen.  For details, see the file below:

ftp://ftp.ccl.net/pub/chemistry/software/MS-DOS/molgen/README

This program installs and runs with no problem on a 25 MHz IBM PS/1 computer with the
WIN3.1 operating system.  However, on a Pentium II 60 MHz computer (WIN95), a DELL
latitude 700 MHz (WIN98), an IBM Thinkpad 900 MHz (WIN98) and a Gateway E-3400 800
MHz (WIN2000), a runtime 200 error occurs.  I have now tracked down that error.  You may
read about it at the address below.

Http://www.merlyn.demon.co.uk/pas-r200.htm#why

Molgen.exe, startmop.exe and startamp.exe are all affected.  Fortunately, using an EXE patch by
Andreas Stiller, the problem may be corrected.  This patch may be found at

ftp://ftp.heise.de/pub/ct/cts/ctbppat.zip

I have used this patch to correct the aforementioned programs, and now molgen runs without a
problem on the computers listed above.  The program molgen.zip will make it easier for you to
install the program.  Just unzip it to your hard drive (C:\, D:\, etc.)  In your autoexec.bat, add the
line

SET MOLGENTEMP=C:\MOLGEN

or some such path for the temporary files generated. Alternatively, you may assign the user varable
molgentemp under system properties in windows.  For example, for Windows 2000 go to
CONTROL PANEL, then SYSTEM, then ADVANCED, then ENVIRONMENTAL
VARIABLES.  Under USER VARIABLES, select NEW.  Enter molgentemp as the variable
name and C:\molgen as the value (for example).   The user manuals may be found in the
original directory

ftp://ftp.ccl.net/pub/chemistry/software/MS-DOS/molgen/

Note: startmop.exe does not work with Mopac150, which is a WIN95 program, so don't replace
mopac.exe with the Mopac150 executable.  I think its great that people like Eric make it possible
for poor university professors like me to do quality research!

Vaneica Young
Associate Professor of Chemistry
University of Florida
young@chem.ufl.edu