Runtime Error (Heap Size=46279KB, Allocated=29777KB) when moving between images

I get this Runtime error when I test apk file on my device

I use the image.visible block to hide and display images according to 3 buttons I have and each one of them should display different image

in the fourth time I try to display image - Runtime error is invoke on the screen

please answer the questions in your other thread https://groups.google.com/d/msg/mitappinventortest/oGHGlbKG0no/GLb-XL1eAroJ

I will close this one. Thank you