I don't know what's the issue above, but the following calculation with fractional nuclear charge seems to execute correctly (although final results might be a concern)
echo
start HZ
title "HZ with fractional nuclear charge by nwchem"
geometry units angstroms
Bq_H 0.0000 0.00000000 0.00000000 charge 0.9000
H 0.7500 0.00000000 0.00000000
end
charge -0.1000
basis
Bq_H library H 6-311g**
H library 6-311g**
end
dft
mulliken
print "mulliken ao"
xc xpbe96 cpbe96
end
task dft
|