I am facing this error while doing Minimization step on my protein.(5ULP)

"Correct charges are unknown for 1 non-standard atom names in otherwise standard residues

Charges of 0.0 were assigned to the unknown atoms

Details in reply log

No MMTK name for atom "HXT" in standard residue "VAL" "

Please could you help me solve this issue

Thanks & Regards

Vishakha Kamble