android - RuntimeException: unable to instantiate application - Class not found? -

android - RuntimeException: unable to instantiate application - Class not found? -

i've been developing app time , have been deploying straight device testing. however, development coming close, i've made first version available on google play store.

however, after downloading app play store, crashes on startup. fortunately android allows end user examine stack trace, appears as:

java.lang.runtimeexception: unable instantiate application com.jysoftware.jyapp.customapp: java.lang.classnotfoundexception: didn't find class "com.jysoftware.jyapp.customapp" on path: dexpathlist[[zip file "/data/app/com.jysoftware.jyapp-1.apk"],nativelibrarydirectories=[/data/app-lib/com.jysoftware.jyapp-1, /vendor/lib, /system/lib]] .......

the classnotfound same class referenced in manifest as:

<application android:name="com.jysoftware.jyapp.customapp" .... </application>

any ideas causing this, or should start look? i'm @ loss why should work when straight deployed eclipse not work when downloaded play store.

android runtimeexception