Can't wipe via TWRP recovery v2.8.7.2

I tried to wipe the system, cache, data and dalvik and it was:
Updating partiition details...
...done
full SElinux support is present.
MTP enabled
simulating actions...
updating partition details...
....done
But the red words FAILED appeared. So what should i do, i even can't wipe my sd card.

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