No resource identifier found for attribute 'showAsAction' in package 'android'

as the title suggest, I'm getting that error in at least 3 of the XML layout files, however, I dont see the attritube "showsAsAction" in any of those XML files, did I miss something or am I just blind?, here are the XML files in question: ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/findSelected" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Registrar Asistencia" android:onClick="registrarAsistencia"/> <ListView android:id="@+id/listaAlumnos" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </LinearLayout> ``` ``` <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center|top" android:orientation="vertical" > <TextView android:id="@+id/lblCuenta" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Cuenta" android:textAppearance="?android:attr/textAppearanceLarge" /> <EditText android:id="@+id/txtCuenta" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="10" /> <TextView android:id="@+id/lblPass" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Contraseña" android:textAppearance="?android:attr/textAppearanceLarge" /> <EditText android:id="@+id/txtPass" android:layout_width="wrap_content" android:layout_height="wrap_content" android:ems="10" android:inputType="textPassword" /> <Button android:id="@+id/btnIniciarSesion" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="iniciarSesion" android:text="Iniciar Sesion" /> </LinearLayout> ``` ``` <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="Large Text" android:textAppearance="?android:attr/textAppearanceLarge" /> </RelativeLayout> ``` Also, I'm using Android 2.2 (API 8) as the target version. I know "showAsAction" was implemented in API 11, but I just cant find the issue here. Update: The problems panel shows the following errors: Error generating final archive: java.io.FileNotFoundException: C:\Users\\Documents\Android\Registro de Asistencia\bin\resources.ap_ does not exist