> When I carry out 'x nn'command, there are some errors as follows: > > NN ENDS > please specify nn-bondlength factor: (usually=2) > NAMED ATOM: Ti1 Z changed to IATNR+200 to determine > equivalency > > I don't know what the reason is. Could you please give some helpful > suggestions? This is not an error but regular output. Don't worry. Stefaan