MergeFiles with hadd

Hello everyone, I need a help to merge my root file
I use hadd but got an error:

Error in <TInterpreter::InspectMembers>: TClass and cling disagree on the size of the class TBaseClass, respectively 128 152

Error in <TInterpreter::InspectMembers>: TClass and cling disagree on the size of the class TClassRef, respectively 16 40

Error in <TInterpreter::InspectMembers>: TClass and cling disagree on the size of the class TClassRef, respectively 16 40

Error in <TInterpreter::InspectMembers>: TClass and cling disagree on the size of the class TEnum, respectively 216 240

*** Error in `hadd': malloc(): smallbin double linked list corrupted: 0x0000000002f7ed20 ***

ROOT Version: 6.20/06
Platform: centOS7
Compiler: cmake version 3.10.2


Hi @M_Arif_Efendi,
Can you make sure that the root prompt works fine?
If so then, please send the steps needed to reproduce your problem.
Cheers,
Vincenzo