g_msd -type -nomw yields D=0.0 for all systems
A line is missing in the code. Addition of the proper line fixes the bug.
Add the following line between line 220 and line 221 in 3.3.1 gmx_msd.c:
Line 220 in calc1_norm() gives r for -type <x|y|z> -nomw. However, r2 is never
calculated for -type in calc1_norm() and therefore for -nomw.
Line 220 should be followed by the line:
as is the case for line 214 and 226 in calc1_norm() and also on line 362 in
calc_one_mw() for -type.