![Runtime Error : Error from Companion: Attempt to invoke virtual method 'java .lang.String java.lang.Throwable.toString()' on a null object reference - MIT App Inventor Help - MIT App Inventor Community Runtime Error : Error from Companion: Attempt to invoke virtual method 'java .lang.String java.lang.Throwable.toString()' on a null object reference - MIT App Inventor Help - MIT App Inventor Community](https://community.appinventor.mit.edu/uploads/default/original/3X/2/e/2ee859bd9dcbc7cb216de8ecf09719461015815b.png)
Runtime Error : Error from Companion: Attempt to invoke virtual method 'java .lang.String java.lang.Throwable.toString()' on a null object reference - MIT App Inventor Help - MIT App Inventor Community
![Error from Companion: Attempt to invoke virtual method 'java.lang.Class java .lang.Object.getClass()' on a null object reference - Bugs and Other Issues - MIT App Inventor Community Error from Companion: Attempt to invoke virtual method 'java.lang.Class java .lang.Object.getClass()' on a null object reference - Bugs and Other Issues - MIT App Inventor Community](https://community.appinventor.mit.edu/uploads/default/optimized/3X/3/9/3906e2c37aea2406ebcf40ec81e6a75142626323_2_1024x575.png)
Error from Companion: Attempt to invoke virtual method 'java.lang.Class java .lang.Object.getClass()' on a null object reference - Bugs and Other Issues - MIT App Inventor Community
![android - I have this error : "Can't convert object of type java.lang.String to type com.flashpub.flash.imageSection" and i don't know why - Stack Overflow android - I have this error : "Can't convert object of type java.lang.String to type com.flashpub.flash.imageSection" and i don't know why - Stack Overflow](https://i.stack.imgur.com/tD3uK.jpg)
android - I have this error : "Can't convert object of type java.lang.String to type com.flashpub.flash.imageSection" and i don't know why - Stack Overflow
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference · Issue #2144 · dooboolab-community/react-native-iap · GitHub
![String Class in Java java.lang Class String java.lang.Object java.lang.String java.lang.Object We do not have to import the String class since it comes. - ppt download String Class in Java java.lang Class String java.lang.Object java.lang.String java.lang.Object We do not have to import the String class since it comes. - ppt download](https://slideplayer.com/9622376/31/images/slide_1.jpg)