R.java file missing/dissapeared

Hi All,

I am a new to Android. I am using the Eclipse IDE for the development.Currently i am practicing / learning temperature converter app on Android 4.1 (API16)..latest one (i think..)

This has happened to me for the first time.
When I am building the application in the IDE the R.java file got disappeared and gives me an error in the .java file where there are any references to the r.id.components.

I have tried to clean project many times.. The below is the error i got on eclipse console..also checked in to the files mentioned in to the file..but found noting..

"[2012-08-12 14:52:48 - HelloWorld3] W/ResourceType( 5012): Bad XML block: header size 91 or total size 0 is larger than data size 0

[2012-08-12 14:52:48 - HelloWorld3] D:\WORKSPACE\HelloWorld3\res\menu\hello3.xml:2: error: Error: No resource found that matches the given name (at 'title' with value '@string/menu_settings')."

Could any one guide me and help me to fix this..

waiting to hear from you guyss..

Thanks