[AMBER] Missing mtkpp directory after installation of AmberTools21

From: Anthony Nash <anthony.nash.ndcn.ox.ac.uk>
Date: Mon, 19 Jul 2021 13:37:03 +0000

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: https://ambermd.org/tutorials/advanced/tutorial20/mcpb.php

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 genMetalFF.sh 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 MCPB.py (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/MCPB.py", 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 Mon Jul 19 2021 - 07:00:02 PDT
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