Flipbook .skba file too large to open

[Anonymous]

Hi,

I created a nice 12 fps animation, lasting about 890 frames. I saved periodically.

Even though I stayed inside the parameters allowed by the program, when I try to open the file today it says "This is not a valid image file, its format or size is not supported, or you may not have read permission for it"

Why was I able to create the file, but now I can't open it? Is there a way to save it? It was so much work.

[Anonymous]

I'm getting the same message on my saved TIF file for an art contest, now when I go to open the original saved file outside of Sketchbook the file is somehow reduced to the very first save. All my progress has been lost if I cannot open the TIF file, if that will even open up to the most recent save of my work. I will be looking into other art programs until a fix that works is found, as this is the second time this has happened to me.