Genexus

Hola queridos,

Tengo un problema para compilar para Android.
Que podrá ser?

Saludos

compile:
    [javac] C:\Program Files (x86)\Android\android-sdk\tools\ant\main_rules.xml:384: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 287 source files to C:\Models\POSD\CSharpModel\mobile\Android\PaullierMobile\bin\classes
    [javac] C:\Models\POSD\CSharpModel\mobile\Android\FlexibleClient\src\com\artech\activities\WorkWithGridActivity.java:22: com.artech.activities.WorkWithGridActivity is not abstract and does not override abstract method getEntity() in com.artech.activities.IGxActivity
    [javac] public class WorkWithGridActivity extends GxActivity implements AdapterView.OnItemClickListener
    [javac]        ^
    [javac] C:\Models\POSD\CSharpModel\mobile\Android\FlexibleClient\src\com\artech\activities\WorkWithGridActivity.java:48: startLoading(boolean) in com.artech.activities.ActivityController cannot be applied to ()
    [javac]             mController.startLoading();
    [javac]                        ^
    [javac] C:\Models\POSD\CSharpModel\mobile\Android\FlexibleClient\src\com\artech\activities\WorkWithGridActivity.java:161: createOptionsMenu(android.view.Menu,com.artech.base.metadata.layout.LayoutDefinition) in com.artech.activities.ActivityController cannot be applied to (android.view.Menu)
    [javac]         return mController.createOptionsMenu(menu);
    [javac]                           ^
    [javac] 3 errors
error:
error: BUILD FAILED
error: C:\Program Files (x86)\Android\android-sdk\tools\ant\main_rules.xml:384: Compile failed; see the compiler error output for details.
error:
error: Total time: 12 seconds
Command:jarsigner -verbose -keystore "C:\Models\POSD\CSharpModel\mobile\Android\PaullierMobile\key\my-release-temp-key.keystore" -storepass artech -keypass artech "C:\Models\POSD\CSharpModel\mobile\Android\PaullierMobile\bin\PaullierMobile-unsigned.apk" alias_name
Command:zipalign -v 4 "C:\Models\POSD\CSharpModel\mobile\Android\PaullierMobile\bin\PaullierMobile-unsigned.apk"  "C:\Models\POSD\CSharpModel\mobile\Android\PaullierMobile\bin\PaullierMobile.apk"
Android Compilation Failed