AChartEngine crash on release -

AChartEngine crash on release -

great library, works in debug.

however, after exported signed application package, crashes every time seek fire chart. just, puff!!!

i'm using sdk 19 , targeting 16 min.

does achartengine have special proguard settings?

any suggestions?

here part of logcat (thanks keshav):

fatal exception: main java.lang.nullpointerexception @ android.view.gles20canvas.drawbitmap(gles20canvas.java:739) @ android.view.gles20recordingcanvas.drawbitmap(gles20recordingcanvas.java:91) @ a.a.b.ondraw(unknown source) @ android.view.view.draw(view.java:13944) @ android.view.view.getdisplaylist(view.java:12838)

crash release achartengine