[gmx-users] g_bundle problem

Justin A. Lemkul jalemkul at vt.edu
Fri Mar 19 02:46:12 CET 2010

Stefan Hoorman wrote:
> I have tried using g_bundle in order to analyse helix axes in my 
> transmembran helices. I created two groups in my ndx file that included 
> the alpha carbons of the first half of my helix and a second group for 
> the alpha carbons for the second half. When I try using g_bundle the 
> following error comes up:
> "Fatal error:
> The size of one of your index groups is not a multiple of n"
> What am I doing wrong?

Not a clue - What is your exact command line?  How many atoms are in each index 
group?  The value of n is the number of parts into which the axes are divided 
and there are several criteria in the code that must be met, else you get this 
error.  So without this information, the best guess is: some criterion is not 
being met.


> Thank you


Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080


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