Upgrade stoped in phase "RFCCHECK_INI". Error: " RFC_ERROR_SYSTEM_FAILURE"

Question

Dear friends,
Please take a look of this case. Is related with a SAP 4.6C (I386/Oracle) upgrade process to SAP ECC 6.0 (I386/Oracle).
Thanks for any help.
Xavier Pol
Case:
====
"RFC_ERROR_SYSTEM_FAILURE" raise in phase "RFCCHK_INI" running the Upagrde Asistance. This is the error show:
Error: RFC of "subst_get_uvers" failed.
Key : RFC_ERROR_SYSTEM_FAILURE
message:
User not authorized. Sesion terminated.
Aditional Information:
========================
- SAPup version (SAPup -V):"This is SAPup version 7.00/2, build 24.067"
- The logon in client "000" with user DDIC, was succesfull
Log RFCCHECK_INI.LOG
===================
1 ETQ201XEntering upgrade-phase "RFCCHK_INI" ("20070605161205")
2 ETQ367 Connect variables are set for standard instance access
4 ETQ399 System-nr = '00', GwService = 'sapgw00'
4 ETQ399 Environment variables:
4 ETQ399   dbs_ora_schema=SAPR3
4 ETQ399   auth_shadow_upgrade=0
4 ETQ220 Reading table "UVERS" via RFC
4 ETQ359 RFC Login to: System="PRD", Nr="00", GwHost="sapupg", GwService="sapgw00"
4 ETQ359 RFC Login to: System="PRD", Nr="00", GwHost="sapupg", GwService="sapgw00"
4 ETQ232 RFC Login succeeded
4 ETQ233 Calling function module "SUBST_GET_UVERS" by RFC
2EETQ360 RFC of "subst_get_uvers" failed:
2EETQ361 code/exception  : SYSTEM_FAILURE
2EETQ362 key             : RFC_ERROR_SYSTEM_FAILURE
2EETQ364 message         :
2EETQ399 User not authorized. Session terminated
4 ETQ359 RFC Login to: System="PRD", Nr="00", GwHost="sapupg", GwService="sapgw00"
4 ETQ232 RFC Login succeeded
2EETQ235 Call of function module "SUBST_GET_UVERS" by RFC failed (error-status "-2")
4 ETQ239 Logging off from SAP system
2EETQ217 Reading UVERS entry via RFC failed
1EETQ204 Upgrade phase "RFCCHK_INI" aborted with severe errors ("20070605162847")

Answer 1

Greetings All
I am doing a CRM upgrade and I get this exact same error.  The DDIC passwords were changed in the 000 client and 001 clients from the default.  (question how do I check the shadow system?)  I updated the parameters in the SAPup via
set DDICpwd
set shdDDICpwd
and yet I still get the error
Should I reset the DD pwd to the SAP default then update the SAPup parameter with the new password?
I check the function module  SUBST_GET_UVERS on se37 for execute the test and execute and the table returns with 0 entries under Tables.
TT_UVERS  Value  0 entries
Is this the problem?  If so how can this be resolved?
Please help, any feedback is much appreciated. 
ps...how and where do I find the RFCCHK_INI.LOG file?