Error Using "0" as an argument in "SendMessage"

I have a method in "script_cameraControl" that looks something like this (this is just a simplified version. This is C# code):

     void SetCameraTo(int camPreset)
     {
         print (camPreset);
     }

Then another class, "script_positionReaderRemote" trying to use "SendMessage" to call it with the argument of the int "0", because there are 4 cameras, "0", "1", "2", "3":

 GameObject.FindGameObjectWithTag("MainCamera").SendMessage("SetCameraTo", 0);

When I set the argument to 1, 2, or 3, I get no problems, but when I set it to 4, I get this error:

Failed to call function SetCameraTo of class script_cameraControl

Calling function SetCameraTo with no parameters but the function requires 1. UnityEngine.GameObject:SendMessage(String, SendMessageOptions) script_positionReaderRemote:BlockHasBeenChosen() (at Assets/scripts/script_positionReaderRemote.cs:127) UnityEngine.GameObject:SendMessage(String) script_blockSelect:Update() (at Assets/scripts/script_blockSelect.cs:38) It appears to think that "0" is not an argument, even though I want to pass in the integer "0" as an argument. Any ideas on why this isn't working? Thanks!