Hi all!

I'm new to this group, and would really appreciate if anyone could help me 
out :)

My molecule is fairly large with arms      A1-D1-E-D2-A2    with counterion 
F(G)3 and solvent H
                                                                C1    C2
                                                                B1    B2


I'm running force matching on a very large system, and yet I keep on 
getting the following error:

*constrained_qrsolve_zero_column_in_matrix*

I assume this means one of my bins is empty and this is why this error is 
spitting out, yet no matter what I try, the error just doesn't go away!
I have around 40 interactions or so in my system, so to narrow down the 
problem, I just ran csg_fmatch on individual interactions to see if it runs:

e.g

A-A interaction runs fine, but then when I change it to A-B, it crashes 
with the above error. Even trying E-E (since there is only one, it can only 
be looking at non-bonded interactions) still gives me an error

Does anyone know what the issue is? I've tried so many min/max/step values 
but all end in failure. 

Please let me know if you need any files!

Many thanks!
Rom

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