Solution : https://service.sap.com/sap/support/notes/848384 (SAP Service marketplace login required)
Key words : 
icnv30l     but000      varid    df50l  swwloghist  db2qlrur    db2lrur  icnv31l  sood        db2qlotrs  db2lotrs  db2qlodlk  sapwlsfihd  db2qlothw  db2lothw  db2lodlk  df55l      db2qlodrs   db2lodrs  cmsd_cascade_cdp, prerequisites ddic error solution note, ddic data type raw, database data type varchar, terms db2 mvs os390, db2 data type varchar, bit data check completed ->, choosing 'repeat complete check', command r3up reset prepare, prepare phase dbprep_chk ensure
Related Notes : 
       
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| 731937 | DB2-z/OS: Customizing DB2 Connect for WebAS 6.20 and DB2 V8 | 
| 728743 | Series z: Release of DB2 V8 for SAP Components | 
| 682077 | DB2-z/OS: Premigration checks for DB2 V8 | 
| 661252 | DB2-z/OS: Additions upgrade to Basis 6.40 | 
| 184399 | DB2/390: DDIC corrections (Releases 4.6A,4.6B,4.6C,4.6D) | 
| 183311 | DB2/390: Automated PTF Check | 
| 162818 | DB2/390: DDIC corrections (4.5A,4.5B) | 
| 162250 | DB2/390: DDIC corrections (3.0F,3.1H,3.1I,4.0B) | 
| 81737 | DB2-z/OS: APAR List |