RE: AMBER: Problems compiling Amber9 on IBM-AIX

From: Ross Walker <>
Date: Mon, 8 Oct 2007 07:39:08 -0700

Hi Sampath

> I am trying to compile Amber 9 on IBM-AIX machine and
> I get the following error: (Here is the last few lines
> from the compilation !!)
> ld: 0711-317 ERROR: undfined symbol: .vtanh
> ld: 0711-345 use the -bloadmap or -bnoquiet option to
> obtain more information

I suspect you have a very old version of the massv library installed which
does not support the vtanh function. Edit $AMBERHOME/src/sander/veclib.f

And change line 104 from:

# ifdef MASSLIB



Then try running make again.

Good luck,


|\oss Walker

| HPC Consultant and Staff Scientist |
| San Diego Supercomputer Center |
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Received on Wed Oct 10 2007 - 06:07:22 PDT
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