"Fatal Error: Unhandled Exception"

[Ofnuts]

• What is the size of the images (width × height) in pixels, and the number of layers?
  
• What is the RAM size of the image (at the bottom of the image display)
  
• What is the tile cache size set to (Edit>Preferences>System resources>Resource consumption)
  
• Is OpenCL enabled (Edit>Preferences>System resources>Hardware acceleration)
  
• How much RAM is reported by Windows?