Solution : https://service.sap.com/sap/support/notes/304597 (SAP Service marketplace login required)
Key words : 
deleted sap data element  140313 -----------------------------------------------------------------------upgrade phases -----------------------------------------------------------------------prepare phase  short text                                  note number -----------------------------------------------------------------------act_46c/spdd  transports qe1k900002, toolimpd2      98198-----------------------------------------------------------------------prepare module cd read -----------------------------------------------------------------------prepare phase  short text                                note number ----------------------------------------------------------------------is_merge       add-, 98673 ----------------------------------------------------------------------prepare module activation checks -----------------------------------------------------------------------prepare phase  short text                                  note number -----------------------------------------------------------------------job_raddrchk  tg063, enhancing storage parameters max_extents / next_extent31/mar/00 iii  renaming sections16/feb/00 viii release note, prepare module import -----------------------------------------------------------------------prepare phase  short text                                  note number -----------------------------------------------------------------------toolimpd2      error, stack overflow exception16/feb/00 vii  prepare/toolimpd2, customer-specific logical databases10/apr/00 viii executing reports, / r3up key word -----------------------<d028310 16/feb/00 >---------------------------r3up keyword, short text                                                note number ---------------------------------------------------------------------upgrade 4, /    r3up key wordii/   important general remarksiii/  correction
Related Notes : 
       
| 304589 | Upgrade 4.6C: .dbenv_<host>.csh/.dbenv<host>.sh | 
| 214529 | Phase CONFCHK_X: SAPMMCDB6.DLL cannot be registered | 
| 213477 | Logical databases lost after upgrade | 
| 211340 | R/3 4.6C Installation/Upgrade Japanese | 
| 203446 | Short dump NESTED_PERFORM_ON_COMMIT when saving | 
| 203428 | Advance info upgrade to 4.6C free space | 
| 202790 | DB6:Additions to the upgrade to 4.6C/4.6C SR1/4.6C SR2 | 
| 201874 | Additions for upgrade to 4.6C/4.6C SR1/4.6C SR2 Oracle | 
| 198589 | Additions Upgrade to 4.6C INFORMIX | 
| 197901 | Supplement for upgrade to 4.6C and 4.6C SR1/SR2 SAP DB | 
| 197775 | DB2/390: Enhancements to upgrade to 4.6C | 
| 195033 | Migration of projects | 
| 193822 | Dump: RHUMST_HRPADUZ, RHUMST_HRPADNN_HRPADUZ | 
| 191270 | Activating the indexes for table MLST | 
| 187034 | ALE FIDCC1/2: Sent documents are cleared | 
| 162980 | saposcol for 64-bit Solaris | 
| 159065 | Data selection for work item archiving | 
| 157755 | Using R/3 as SAP Retail (Release 4.6A/B 4.6C 4.70 5.00) | 
| 153205 | Direct deletion of type C work items | 
| 148926 | saposcol version 32 or 64 bit on ReliantUNIX | 
| 147610 | Table T5UT4 is displayed in SPDD for adjustment | 
| 145794 | LONGPOST.LOG: Error filling table "STACUST" | 
| 145291 | Performance of deletion from archive file | 
| 140313 | Phase ACTREF_CHK in PREPARE module act.checks | 
| 140071 | PCON_<rel>: R3up reports termins. in R/3 System | 
| 137607 | R/3 Upgrade Assistant: stack overflow exception | 
| 137599 | NO R/3 Upgrade Assistant on Digital UNIX 3.2 | 
| 137594 | R/3 Upgrade Assistant: no connection to server | 
| 137590 | Starting Upgr. Ass. from within MS Intnt Expl. 4.0 | 
| 137587 | R/3 upgrade Assistant: PREPARE stops | 
| 133017 | Namespace conflicts w. upgrade to Release 4.x | 
| 74831 | SPDD:Transports QE1K900002, TCVK900029, EWSK900052 | 
| 73999 | Phase PCON_<REL>: TG450 to TG453 | 
| 49545 | Deleting unnecessary work items | 
| 11777 | ORA-1632 max # extents <n> reached in index <ind.> |