iOS 7 Critical failure: the LastResort font is unavailable -

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when app first launches create bunch of custom uifonts (they correctly added .plist). custom fonts work until try create more 9 10 of them. after 9 or 10th custom font created, warning "critical failure: lastresort font unavailable." warning on ios 7 devices , can't seem figure out why. has bug ios 7 because every custom font works on ios 6 devices, , i'm using 1 project. idea causing warning, , how fix it?

it happened me ios 7..i removed fonts , added 1 one plist. there font "bad" ios 7 , caused mess. hope help) of course bug in apple's matrix


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