Image saved to device quits on re-load

Unity Engine
1

I’m saving a Screenshot to my devices persistentDataPath. On my Mac while running the app it saves ok and will load back ok. However when running on my device it acts strangely. If I take a new screenshot it seems to save and display ok, but if I then re-load the scene the app immediately quits. Starting the app again loads fine, with the last screenshot intact.

The code’s fairly lengthy but the screen grab works fine and decodes to .png ok, then I use this to save:

 var file = new File.Open(Application.persistentDataPath + "/" + "snapshot" + ".png", FileMode.Create);
     var binaryWriter = new BinaryWriter(file);
     binaryWriter.Write(bytes);
     file.Close();

Then I read the image back with:

var directory = Application.persistentDataPath;	
var fileName1 = Path.Combine( Application.persistentDataPath+"/","snapshot"+".png" );				
var bytes = File.ReadAllBytes( fileName1 ); var SnapShot1 = new Texture2D( 73, 73 );	SnapShot1.LoadImage( bytes ); 
renderer.material.mainTexture = SnapShot1; }

I’m pretty unfamiliar with writing to devices, am I missing something obvious here which makes the app throw a fit on a same-session re load yet is fine with the screenshot file on a restart?

2

Anyone ever had a problem similar to this? I’m now using a specific plugin (with a tidy screenshot capture function) to save my screenshot and it’s the same so can’t be my clumsy screengrab code. I made a smaller app that simply uses the phones camera and grabs a screen shot (i’m projecting the camera view onto a plane mesh).

A GUI button then reloads this simple app and it ALWAYS resets/quits. But…reloading the app without taking a screen grab is ok and reloads the app normally. Would an overlarge/wrongly sized texture image do this? Any other guesses, i’m going insane!