How do I change the logged text based on a momentary collision?

I'm exporting several pieces of information about the player in a game to a text file outside of unity using the script below. I want to constantly know the player's x and z position, as well as their rotation so I can see where they're facing in the environment. I also want to know when they make a specific type of error, which, in this case, is running into a wall. When they are not running into a wall, I want 0 to be printed, and when they have run into a wall, I want 1 to be printed. Everything prints out exactly how I want it to except for the wall error, which always prints 1. Here's the script and if you have any idea why this is happening I would greatly appreciate some feedback. Thanks!

EDIT: I changed the if (wallError = false) to if(wallError == false) which constantly makes it print 0 instead of 1. I think this means the problem is in the OnCollisionEnter portion of the script, as this would result in wallError never being switched from false to true. Does anyone see a problem with that part of the script that could be causing the issue?

 using UnityEngine;
 using System.Collections;
 
 public class Coordinates : MonoBehaviour {
 
     // Use this for initialization
     void Start () {
     
     }
 private string xText;
 private string zText;
 private string rotText; 
 private string errorText;
 public static bool wallError = false;
     void FixedUpdate () {
         string path = @"/Desktop/museum/Log/coords";
             xText = "\n" + transform.position.x;
             zText = " , " + transform.position.z;
             rotText = " , " +  transform.rotation;
             if (wallError = false)
                 errorText = " , 0 ";
             else
                 errorText = " , 1 ";
             System.IO.File.AppendAllText(path, System.String.Format("{0}{1}{2}{3}", xText, zText, rotText, errorText));
     
     }
     void OnCollisionEnter (Collider other) {
         if (other.name == "Catch Wall")
             wallError = true;
     }
 }