visual studio 2012 - "Failed to sign" error when trying to create Windows store app package -


i struggling weird error day. have developed windows store (metro) app , created app package in past.

but today, can't create app package , error message says: failed sign 'c:\users\xx\documents\visual studio 2012\projects\xx\apppackages\xx_1.0.2.5_anycpu_test\xx_1.0.2.5_anycpu.appx'. signtool error: unexpected internal error has occurred. error details points me file microsoft.appxpackage.targets following line: <signappxpackage appxpackagetosign="@(finalappxpackageitem)"

who can fix , create app package? appreciated.

did applied visual studio 2012 update 2 ? in recent service pack (begenning if month), changes related app certifications. anyway upgrade resolve issue.


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