Solution : https://service.sap.com/sap/support/notes/661252 (SAP Service marketplace login required)
Key words : 
shadow default profile <dir_put>/<sapsid>/sys/profile/default, db2 sysadm group <db2adm> mentioned, applying basis support package sapkb64005, tool         patch  version    note/remark ----         -----  -------    ----------- r3up 640/2   29     21, ibm db2 connect v8 fp6, upgrading reset zparm parameter maxdbat, transaction db02 --> check --> database <-> dictionary, general information supported operating systems, individual upgrade phases phase initput_pre, profile parameter em/address_space_mb
Related Notes : 
       
| 1092921 | DB2-z/OS: SQLCODE -904/-913 RC=00C90096 (upgrade/EhPI/SUM) | 
| 977788 | DB2-z/OS: SQLCODE -407 during upgrade phases SHADOW_IMPORT_* | 
| 932894 | DB2-z/OS: Performance of upgrade phase RUN_RSCPFROM | 
| 926100 | Upgrade on x86_64 / DB2-z/OS / WINDOWS | 
| 882751 | DB2-z/OS: Avoid SQLCODE -601 in R3up phase PARMVNT | 
| 848384 | DB2-z/OS: Inconsistent fields with DDIC type RAW/LRAW/VARC | 
| 843356 | DB2-z/OS: Upgrade phase JOB_RSSWINCV fails | 
| 788218 | Add. info. on upgrading to SAP ERP Central Component 5.0 SR1 | 
| 775047 | Add. info. on upgrading to SAP Web AS 6.40 SR1 | 
| 726217 | DB2-z/OS: Upgrade to SRM 4.0 - free space | 
| 726216 | DB2-z/OS: Upgrade to SCM 4.1 - free space | 
| 726215 | DB2-z/OS: Upgrade to ECC 5.0 - free space | 
| 705578 | Additions to upgrade on SAP SRM Server 5.0 | 
| 689574 | Add. info. on upgrading to SAP ERP Central Component 5.00 | 
| 686905 | DB2-z/OS: DDIC corrections (6.20 and higher) | 
| 684406 | Additional information on upgrading to SAP SCM 4.1 | 
| 663258 | Corrections for R3up version 640 | 
| 663240 | Repairs for upgrade to Basis 640 | 
| 661640 | Add. info. on upgrading to SAP Web AS 6.40 | 
| 661253 | DB2-z/OS: Upgrade to Web AS 6.40 - free space | 
| 407663 | DB2/390: DDIC corrections (6.10, 6.20) | 
| 184399 | DB2/390: DDIC corrections (Releases 4.6A,4.6B,4.6C,4.6D) | 
| 162818 | DB2/390: DDIC corrections (4.5A,4.5B) | 
| 162250 | DB2/390: DDIC corrections (3.0F,3.1H,3.1I,4.0B) |