Re: [AMBER] Missing mtkpp directory after installation of AmberTools21

From: Anthony Nash <>
Date: Tue, 20 Jul 2021 14:55:59 +0000

In answer to my own question, I created a new environment and I've downloaded and installed AmberTools21 from source.

However, having now looked through the manual pdf, and compared it to the HTML page dating 2015 which begins with running, all of the required variables for aren't in the bcl files that genMetalFF originally generated.

Rather than hack around hoping something will work, is there a latest and greater bonded model tutorial specifically designed with the latest in mind?


Kind regards
Dr Anthony Nash PhD MRSC

Senior Research Scientist
Nuffield Department of Clinical Neurosciences
RMCR Kellogg College
University of Oxford

From: Anthony Nash <>
Sent: 19 July 2021 14:37
To: <>
Subject: Missing mtkpp directory after installation of AmberTools21

Dear all,

I'm a new user of AMBER but a long time MD modeller and I'm hoping I can get some help resolving a post-installation concern over what and where some of the files are.

I am trying to step through the bonded metal-binding centre tutorials given here:

The only difference is that I'm using my own set of pdb files. Six in total; two zinc-based and four calcium-based coordination centres.

I installed AmberTools21 in Linux (in fact, it was WSL2 Ubuntu) using conda. The installation didn't flag up any problems.

These are my concerns/issues:

Firstly, as per the tutorial linked above, I wasn't able to find in my AMBERHOME directory structure. So, I downloaded the file from the link provided in the tutorial and generated the corresponding setup files for MCPB.

Then, the next slight concern I ran into was upon investigating zinc_1201_settings.bcl (one of my generated files) I noticed the directory structure AMBERHOME/dat/mtkpp/ is missing!

Finally, before resorting to this email, I was unable to find the MCPB executable. Instead, I'm able to find (of which, I've noticed the command line arguments are slightly different to the command line arguments of MCP B). Either way, I decided to execute the python executable and I got the following error:

Traceback (most recent call last):
  File "/home/ubuntu/miniconda3/envs/AmberTools21/bin/", line 67, in <module>
    options.step = options.step.lower()
AttributeError: 'NoneType' object has no attribute 'lower'

All suggestions are welcome.

Many thanks

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Received on Tue Jul 20 2021 - 08:00:03 PDT
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