error in program BLZSCHM during the update of TABLE_MAP table ( BLZDB2LD job)

I'm trying to better understand the unload-reload procedure for RTC tables ( my RTC version is RTC301) in case of table migrations . So I'm working on my RD&T environment  ( Db2 v9)  in order to see the details about these jobs
The unload job was fine and worked correctly
The reload is able to reload all tables to do the repair and the bind activity but the UPDATE STEPS went in error

DSN                                                                             
  RUN PROGRAM(BLZSCHM) PLAN(BLZSCHM)       LIB('BLZ300.SBLZLOAD')       PARMS('/
IKJ56641I DSN      ENDED DUE TO ERROR+                                          
IKJ56641I SYSTEM ABEND CODE 04E   REASON CODE 00C20305         
               
and after

CEE3250C The system or user abend S04E  R=00C20305 was issued.                 
         From entry point BLZSCHM at compile unit offset +0000100E at entry offs

I can send the output of job and the entire jcl  used.