Coroutine not running

Hi guys, i have a problem with a coroutine. When i debug the game i see the line of execution does not enter in the coroutine code:

 void Update(){
    if (iCondition==true){
    StartCoroutine("iRun");
    }
 }
 
 IEnumerator iRun(){      // In debug mode the tracing line dont pass this point
         while (iCondition==true){
 //         ...... CODE .....      //
            yield return 0;
         }
 }

When debug reaches the commented line, in the watch window i notice iCondition value is null. Any idea why is this happening?