No problem. I should have had you check that first. It's a required step that people often overlook.

QCAR_SDK_ROOT was unchecked, i checked and the app works fine!!
i already checked the box in the other samples, and works fine too, thank you very much for your help and your patience.

Please confirm that the libQCAR and libFrameMarkers *.so files are in the armeabi folders ( /FrameMarkers/Libs/ ).

You'll also want to confirm that QCAR_SDK_ROOT is defined for this project - Go to: File > Properties > Java Build Path > check QCAR_SDK_ROOT

So you have been able to run the ImageTargets and the BTA samples successfully, but FrameMarkers is throwing these errors?

By the way, i already built and ran the ImageTarget and BackgroundTextureAccess apps successfully, the other examples show me the same error message

i made the QCAR filter, but the LogCat's log is in blank, i tried to open the app installed on the device, then the screen turns black for a few seconds, then show me the message "com.qualcomm.QCARSamples.FrameMarkers ...."

In Eclipse's LogCat console you can add filters to isolate the message types that you want to see. Try adding one for QCAR by clicking the plus sign, next to Saved Filters, and entering QCAR for the filter name and log tag, you can also filter by the app's PID. I'm not seeing evidence of a crash, but this will be easier to determine if you can isolate the messages from the sample app.

Have you tried opening the FrameMarkers app on your device? - i.e. after installing it. It looks like the installation is being mediated by a Device Policy app, and I'm wondering if that's affecting its ability to initiate from the installation process.

Logcat show me this:

06-22 12:55:03.342: E/AndroidRuntime(12458): FATAL EXCEPTION: main

06-22 12:55:03.342: E/AndroidRuntime(12458): java.lang.ExceptionInInitializerError

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.Class.newInstanceImpl(Native Method)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.Class.newInstance(Class.java:1409)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.Instrumentation.newActivity(Instrumentation.java:1024)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1565)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.ActivityThread.access$1500(ActivityThread.java:117)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.os.Handler.dispatchMessage(Handler.java:99)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.os.Looper.loop(Looper.java:130)

06-22 12:55:03.342: E/AndroidRuntime(12458): at android.app.ActivityThread.main(ActivityThread.java:3691)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.reflect.Method.invokeNative(Native Method)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.reflect.Method.invoke(Method.java:507)

06-22 12:55:03.342: E/AndroidRuntime(12458): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)

06-22 12:55:03.342: E/AndroidRuntime(12458): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:670)

06-22 12:55:03.342: E/AndroidRuntime(12458): at dalvik.system.NativeStart.main(Native Method)

06-22 12:55:03.342: E/AndroidRuntime(12458): Caused by: java.lang.NoClassDefFoundError: com.qualcomm.ar.pl.CameraPreview

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.Runtime.nativeLoad(Native Method)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.Runtime.loadLibrary(Runtime.java:432)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.System.loadLibrary(System.java:554)

06-22 12:55:03.342: E/AndroidRuntime(12458): at com.qualcomm.QCARSamples.FrameMarkers.FrameMarkers.loadLibrary(FrameMarkers.java:675)

06-22 12:55:03.342: E/AndroidRuntime(12458): at com.qualcomm.QCARSamples.FrameMarkers.FrameMarkers.<clinit>(FrameMarkers.java:101)

06-22 12:55:03.342: E/AndroidRuntime(12458): ... 15 more

06-22 12:55:03.342: E/AndroidRuntime(12458): Caused by: java.lang.ClassNotFoundException: com.qualcomm.ar.pl.CameraPreview in loader dalvik.system.PathClassLoader[/data/app/com.qualcomm.QCARSamples.FrameMarkers-1.apk]

06-22 12:55:03.342: E/AndroidRuntime(12458): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)

06-22 12:55:03.342: E/AndroidRuntime(12458): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)

06-22 12:55:03.342: E/AndroidRuntime(12458): ... 20 more

were marked in red

sorry for the delay, i checked the step 3 and re-build, but show me an error: [2012-06-22 12:24:05 - FrameMarkers] Please execute 'adb uninstall com.qualcomm.QCARSamples.FrameMarkers' in a shell.

i did it, then, i tried to build and run but the app still crashing

Be sure to run ndk-build from your FrameMarkers sample directory. See: Step 3 in Getting Started - SDK , https://ar.qualcomm.at/sdk

If you still have problems, please post your build & run session log from the Eclipse DDMS LogCat console. You may need to highlight the app process in the DDMS to see these messages.