FAQ
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What’s the difference between MOPAC in AMS2019 and in previous versions (AMS2018)?
==================================================================================

In AMS2019 we have made a new MOPAC library, which is fully integrated
as an Engine with the AMS driver and our GUI. This new MOPAC works
much faster as a pre-optimizer and with any AMS driver functionality.
This version of MOPAC is based on the original MOPAC code of Dr.
Stewart and contains much but not all of the functionality. In
AMS2019, MOPAC is included with the DFTB module. With AMS2018 it is
possible to use the openmopac binaries, with all original
functionality, and MOPAC could also be used  as an external engine.
The MOPAC binaries in AMS2018 were free of charge for academic groups
with any other license. In AMS2018 there is no support for the new
integrated MOPAC Engine.

Older ADF Modeling License suite licenses could also contain the
external MOPAC binary and corresponding GUI support.


How to use keywords from the MOPAC manual?
==========================================

In ADFInput in the Details → Run script tab, you can change the MOPAC
input file before submitting the calculation. A list of MOPAC keywords
(from http://openmopac.net/manual/allkeys.html):


Keywords used in MOPAC2012
--------------------------


Which properties from MOPAC can be visualized with the GUI?
===========================================================

Besides facilitating building molecules, our GUI can also visualize
the progress of geometry optimizations, MOPAC charges, and IR modes.
Geometry optimization can also be done interactively, e.g. to pre-
optimize your molecule or periodic system.
