Could you post the exact error? The only reason I would think it says not "openable" ( nor sure if that's a word ) is if you are in file manager in TWRP.
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Samsung Galaxy S ll T989
Rooted, Running on stock ROM, stock kernel 2.3.3
Nexus 7 2013 Tablet
Rooted, Running on stock ROM. 4.3, ElementalX Kernel 1.8
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