Android Studio : Unable to recreate missing debug keystore -


i'm sorry if question duplicate, have spent few days finding solution problem , couldn't find one, can't comment in existing question decided ask new one.
when try run app in android studio have error:

error:execution failed task ':app:validatedebugsigning'. > unable recreate missing debug keystore. 

as far know, keystore file located in folder (user)/.android (i'm using windows 8.1) there keystore file in folder.

what have tried:
- deleted old keystore file , tried create new 1 running app in android stuidio error said, couldn't create keystore file.
- managed create new keystore file running app in eclipse, ddms.cfg file:

#thu jul 16 17:18:42 ict 2015 pingoptin=true adtused=true pingtime.eclipse=1437041922450 pingtime.adt=1437041922448 pingid=-2893797175409321994 

i checked permission of .android folder, permissions allowed.
still, have same error when try run app.
hope can me.
(i know there question same title couldn't understand answer, can't comment ask)

you have check permission of .android file following commands..

$cd ~ $ls -la 

then see file ".android", permission level.. user permitted if there more 1 users. if such case give sudo permission required user.. in case

sudo chmod 777 -r .android 

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