ios - Weird iPhone error when running on device -

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i've run app on iphone before, , have no idea how randomly started not working, i'm getting following error:

unable read symbols /developer/platforms/iphoneos.platform/devicesupport/4.2.1 (8c148)/symbols/developer/usr/lib/libxcodedebuggersupport.dylib (file not found).

so, cleaned targets , deleted app on device , reinstalled , ran it, , i'm getting error:

warning: unable read symbols /developer/platforms/iphoneos.platform/devicesupport/4.2.1 (8c148)/symbols/usr/lib/info/dns.so (file not found).

what , how fix it?

well, have same problem disables debugging (doesn't find debugger symbols of version installed on device). except debugging, installs app normally.

know few people got rid of these warnings doing of following 2 :
1) copy 4.2.1 symbols folder /developer/platforms/iphoneos.platform/devicesupport/ path symbols fodler in 4.2.1 (8c148) folder
2) @ one


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