#include <FWCore/Framework/interface/MakeDataException.h>
Description: An exception that is thrown whenever a Proxy had a problem with its algorithm.
Usage: This exception will be thrown automatically if a a class that inherits from DataProxyTemplate<> returns 0 from its make method.
If you wish to explain the reason for the error, you can throw a MakeDataException from within your Proxy E.g.
if(outOfBoundsValue) { throw MakeDataException(" value out of bounds", MakeDataExceptionInfo<record_type, value_type>(iDataKey)); }