void combindavidformdataTableInfosetZoomfloat on a null object reference

This error message indicates that you are trying to call the method "setZoom" on an object that is null, meaning it does not exist or has not been initialized.

To fix this error, you need to make sure that the object you are trying to call the method on exists and has been properly initialized. Check that you have instantiated the object before calling the method and that there are no null references in the code leading up to this point.