ArguentOutOfRangeException: Argument is out of range. Parameter name:index

Hi, up until recently I had some code that was working fairly well. I'm not sure what I did, but now it's throwing an ArgumentOutOfRangeException and I have no idea what is causing it. Can anyone help me?

 using UnityEngine;
 using UnityEngine.UI;
 using System;
 using System.Collections;
 using System.Collections.Generic;
 
 public class SearchMap : MonoBehaviour {
     public float tagPercent = 80;
     private float inputRatio;
     private int q;
     private int b;
     private locationDatabase database;
     public List<Location> seenLocations = new List<Location>();
     public List<Location> newLocations = new List<Location> ();
     private List<Location> savedLocations = new List<Location> ();
     public List<string> tagList = new List<string> ();
     public string[] tagArray;
     public GameObject locListItem;
     public GameObject viewContent;
     public GameObject locMenu;
     public GameObject spawnItem;
     public GameObject curPip;
     public Transform pipHolder;
     public InputField iField;
     public string myName;
     public string tinyTag;
     public string[] tags;
     openLocation oLocation;
     public Sprite bluePip;
     public Sprite redPip;
     private bool tagLength;
     
 
 
     public void bounceName()
     {
 
         foreach(Transform child in pipHolder)
         {
             child.gameObject.SetActive(false);
         }
         myName = iField.text.ToLower ();
 
         foreach (Transform child in viewContent.transform) 
         {
             Destroy (child.gameObject);
         } 
         foreach (Location loc in database.locations) 
         {
             tagLength = false;
             tagArray = database.locations[b].locTags.Split(',');
             q = 0;
             foreach(string tag in tagArray)
             {
                 if(tagArray[q].Contains(myName) && (myName.Length * 1f)/(tagArray[q].Length * 1f) >= tagPercent/100)
                 {
                     Debug.Log(tagArray[q]);
                     tagLength = true;
                     break; 
                 }
                 q++;
             }
             Debug.Log("before suspect");
             Debug.Log(database.locations[b]);
             if ((!seenLocations.Contains (database.locations [b])) && savedLocations.Contains (database.locations [b]) && tagLength) 
             {  
                     seenLocations.Add (database.locations [b]);
                     Debug.Log("Added: " + seenLocations[b]);
                     b++;
             } 
 
             else if ((!seenLocations.Contains (database.locations [b])) && !savedLocations.Contains (database.locations [b]) && tagLength) 
             {
                     newLocations.Add (database.locations [b]);
                     Debug.Log("Added: " + newLocations[b]);
                     b++;
             }
             else
             {
                 b++;
                 Debug.Log("Went to C Round");
             }
             Debug.Log("Stuck at end of part I");
         }
         Debug.Log ("Made it end of part I");
         b = 0;
         foreach (Location loc in newLocations) {
             Debug.Log("In part 2");
             spawnItem = Instantiate (locListItem) as GameObject;
             spawnItem.transform.SetParent (viewContent.transform, false);
             spawnItem.transform.localPosition = new Vector3 (100, -39 - (70 * b), 0);
             oLocation = spawnItem.GetComponent<openLocation> ();
 
             oLocation.locName = newLocations [b].locName;
             oLocation.locAddress = newLocations [b].locAddress;
             oLocation.locDescription = newLocations [b].locInfo;
             oLocation.locScene = newLocations[b].locScene;
             oLocation.pipNumber = (b + 1).ToString();
             oLocation.newPip = true;
             oLocation.locMenu = locMenu;
 
             curPip = pipHolder.FindChild(newLocations[b].locName).gameObject;
             curPip.gameObject.transform.GetComponent<Image> ().sprite = redPip;
             curPip.transform.GetChild(0).GetComponent<Text>().text = (b + 1).ToString();
             curPip.transform.GetComponent<Pip>().listButton = spawnItem;
             curPip.SetActive(true);
             
             b++;
         }
         b = 0;
         foreach (Location loc in seenLocations) {
 
             spawnItem = Instantiate (locListItem) as GameObject;
             spawnItem.transform.SetParent (viewContent.transform, false);
             spawnItem.transform.localPosition = new Vector3 (100, -39 - (70 * (b + newLocations.Count)), 0);
             oLocation = spawnItem.GetComponent<openLocation> ();
 
             oLocation.locName = seenLocations [b].locName;
             oLocation.locAddress = seenLocations [b].locAddress;
             oLocation.locDescription = seenLocations [b].locInfo;
             oLocation.locScene = seenLocations[b].locScene;
             oLocation.pipNumber = (b + 1).ToString();
             oLocation.newPip = false;
             oLocation.locMenu = locMenu;
 
             curPip = pipHolder.FindChild(seenLocations[b].locName).gameObject;
             curPip.gameObject.transform.GetComponent<Image> ().sprite = bluePip;
             curPip.transform.GetChild(0).GetComponent<Text>().text = (b + 1).ToString();
             curPip.transform.GetComponent<Pip>().listButton = spawnItem;
             curPip.SetActive(true);
 
 
             b++;
 
         }
 
         b = 0;
         foreach (Location loc in seenLocations) {
             savedLocations.Add (seenLocations [b]);
             b++;
         }
         seenLocations.Clear();
 
         b = 0;
         foreach (Location loc in newLocations) {
             savedLocations.Add (newLocations [b]);
             b++;
         }
         newLocations.Clear();
 
         }
         
         //Debug.Log (myName);
 
 
     void Start()
     {
         database = GetComponent<locationDatabase> ();
     }
 
 }

The locations themselves just hold a bunch of strings, the last of which is a list of tags the player can search for, separated by commas. Here's the full error:

ArgumentOutOfRangeException: Argument is out of range. Parameter name: index System.Collections.Generic.List`1[Location].get_Item (Int32 index) (at /Users/builduser/buildslave/mono-runtime-and-classlibs/build/mcs/class/corlib/System.Collections.Generic/List.cs:633) SearchMap.bounceName () (at Assets/Scripts/testing/SearchMap.cs:75) UnityEngine.Events.InvokableCall.Invoke (System.Object[] args) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:149) UnityEngine.Events.InvokableCallList.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:626) UnityEngine.Events.UnityEventBase.Invoke (System.Object[] parameters) (at C:/buildslave/unity/build/Runtime/Export/UnityEvent.cs:766) UnityEngine.Events.UnityEvent.Invoke () (at C:/buildslave/unity/build/Runtime/Export/UnityEvent_0.cs:54) UnityEngine.UI.Button.Press () (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:35) UnityEngine.UI.Button.OnPointerClick (UnityEngine.EventSystems.PointerEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/UI/Core/Button.cs:44) UnityEngine.EventSystems.ExecuteEvents.Execute (IPointerClickHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:52) UnityEngine.EventSystems.ExecuteEvents.Execute[IPointerClickHandler] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.EventFunction`1 functor) (at C:/buildslave/unity/build/Extensions/guisystem/UnityEngine.UI/EventSystem/ExecuteEvents.cs:269) UnityEngine.EventSystems.EventSystem:Update()