Dear Patrick,

are these problems related to PC ?  I use MAC and have never had a problem with 
Avogadro.

Cheers,

Andre

On 22 Oct 2016, at 16:34, Patrick Avery 
<psav...@buffalo.edu<mailto:psav...@buffalo.edu>> wrote:

Hi Michael,

This usually means the force field files were not found. These are the files at 
this location: https://github.com/openbabel/openbabel/tree/master/data

I can think of two likely scenarios. Either

1: you don't have the files. Check your install location (probably C:\Program 
Files (x86)\Avogadro). Open the bin folder and see if the force field files are 
there.

2: if you do have the files, the force field files may not be loading if 
Avogadro's runtime location is not in C:\Program Files (x86)\Avogadro\bin. You 
can double click the Avogadro executable in C:\Program Files (x86)\Avogadro\bin
And the force fields should work then. If you are using a shortcut, right click 
it and select "properties" and make sure it says it is starting in C:\Program 
Files (x86)\Avogadro\bin and not C:\Program Files (x86)\Avogadro.

I tried setting it up to make sure we wouldn't run into either of those 
problems. Perhaps I missed something, though. Did you create your own shortcut?

Thanks,
Patrick

On Friday, October 21, 2016, Michael Morgan 
<michaelmorgan...@gmail.com<mailto:michaelmorgan...@gmail.com>> wrote:
Dear All,

My Avogadro’s AutoOptimization stopped working. When I clicked “Start”, it 
showed “AutoOpt: Could not setup force field…”. I have tried most simple
molecules, as well as choosing different force field. All the same. Any idea 
what is wrong?

My Avogadro version is most recent one (1.2.0). Windows 10.

Thank you very much.

Best
Michael


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