Anyway, replicated the error you reported to me!
Ok thank you, also this may help.
under my weapons I have this in notetag, when they equip a weapon it changes the look of tha character.
<Custom On Equip Eval>
user._prevCharName = user._prevCharName || user._characterName;
user._prevCharIndex = user._prevCharIndex || user._characterIndex;
user._prevFaceName = user._prevFaceName || user._faceName;
user._prevFaceIndex = user._prevFaceIndex || user._faceIndex;
user._prevBattlerName = user._prevBattlerName || user._battlerName;
user.setFaceImage("Oracle2longsword%(8)_Face", 0);
user.setCharacterImage("oracle2longsword%(8)", 0);
user.setBattlerImage("Oracle2longsword%(8)_MVsv");
user.refresh();
$gamePlayer.refresh();
</Custom On Equip Eval>
<Custom On Remove Equip Eval>
user.setCharacterImage(user._prevCharName, user._prevCharIndex);
user.setFaceImage(user._prevFaceName, user._prevFaceIndex);
user.setBattlerImage(user._prevBattlerName );
user.refresh();
user._prevCharName = undefined;
user._prevCharIndex = undefined;
user._prevFaceName = undefined;
user._prevFaceIndex = undefined;
user._prevBattlerName = undefined;
$gamePlayer.refresh();
</Custom On Remove Equip Eval>