Batch File and Script to Make Multiple Builds

I have been trying to create a batch file that I can run to call a script to make multiple builds. However, the batch starts and exits without printing any useful information, so I was wondering if you could help me identify something I may have overlooked. Thank you in advance.

Batch: %UNITY% -batchmode -nographics -quit -projectPath %~dp0 -executedMethod BuildUnityPlayer.PerformBuild

Script:

 using UnityEngine;
 using System.Collections;
 using System;
 using UnityEditor;
 
 public class BuildUnityPlayer  : MonoBehaviour {
 
     public static void PerformBuild()
     {
         // the scenes we want to include in the build
         string[] scenes = { "Scenes/A.unity", 
                 "Scenes/B.unity",
                 "Scenes/C.unity"
             };
         
         DateTime currentDate = DateTime.Now;
         string buildName = "Game-"+currentDate.ToShortDateString();
         
         // build for windows stand alone
         string windowsStandAloneBuildName = buildName+"-StandAlone.exe";
         EditorUserBuildSettings.SwitchActiveBuildTarget(BuildTarget.StandaloneWindows);
         BuildPipeline.BuildPlayer(scenes, windowsStandAloneBuildName, BuildTarget.StandaloneWindows, BuildOptions.None);
         
         // build for web player
         string webplayerBuildName = buildName+"-WebPlayer.exe";
         EditorUserBuildSettings.SwitchActiveBuildTarget(BuildTarget.WebPlayer);
         BuildPipeline.BuildPlayer(scenes, webplayerBuildName, BuildTarget.WebPlayer, BuildOptions.None);
     }
 }