Error occurred in script: Mob Commanders Mod.js
org.mozilla.javascript.WrappedException: Wrapped java.lang.RuntimeException: setMaxHealth called on non-mob: entityType=0
	at org.mozilla.javascript.Context.throwAsScriptRuntimeEx(Unknown Source)
	at org.mozilla.javascript.MemberBox.invoke(Unknown Source)
	at org.mozilla.javascript.FunctionObject.call(Unknown Source)
	at org.mozilla.javascript.Interpreter.interpretLoop(Unknown Source)
	at script.useItem(Mob Commanders Mod.js)
	at org.mozilla.javascript.Interpreter.interpret(Unknown Source)
	at org.mozilla.javascript.InterpretedFunction.call(Unknown Source)
	at org.mozilla.javascript.ContextFactory.doTopCall(Unknown Source)
	at org.mozilla.javascript.ScriptRuntime.doTopCall(Unknown Source)
	at org.mozilla.javascript.InterpretedFunction.call(Unknown Source)
	at net.zhuoweizhang.mcpelauncher.ScriptManager.callScriptMethod(ScriptManager.java:288)
	at net.zhuoweizhang.mcpelauncher.ScriptManager.useItemOnCallback(ScriptManager.java:300)
Caused by: java.lang.RuntimeException: setMaxHealth called on non-mob: entityType=0
	at net.zhuoweizhang.mcpelauncher.ScriptManager$NativeEntityApi.setMaxHealth(ScriptManager.java:3139)
	at java.lang.reflect.Method.invoke(Native Method)
	... 10 more