error from using CString.GetBuffer (MAX_PATH),

CString ftitle;
fscanf_s(f_ptr_seed_inf,"%s\n",ftitle[ifl].GetBuffer(MAX_PATH));
ftitle[ifl].ReleaseBuffer();

I got error message:

Unhandled exception at 0x776015de in MSW_Vib_Model.exe: 0x00000000: The operation completed successfully.

Please help