Error in Reading a root file

Dear All,
When I want to read a root file I got the following error. Please give your comments/suggestion on how to solve the problem.

======================error message==========================
��Oc�ۖ$6�ű�4���@D�0�rv$�’��er>: Unknown class �?����h���
��� [���/H+N�@��u+a�
Info in TFile::GetStreamerInfoList: cannot find the StreamerInfo record in file data/10GeV_0_7fm.root
Error: illegal pointer to class object t1 0x0 2968 prog1.C:36:
*** Interpreter error recovered ***


see your other identical post for a followup