[Wien] What is wrong with aim?

[panzhijun2002]

Hi,all users of wien2k:
   I want to perform aim calculation.After initialization and scf,the following message 
   ERROR IN OPENING AIM.DEF !!!!
   FORTRAN STOP AIM.DEF
come out when I execute the command of aim aim.def.What is the matter?Please help me.Thank you in advance.
   Best regards.
                                      Z J Pan