Solution : https://service.sap.com/sap/support/notes/308537 (SAP Service marketplace login required)
Key words : 
delete temporary tables additionally created, -called 'pseudo closed cursors', hierarchies produces sql error -104 'token /, abap runtime error perform_not_found, accelerates fast running queries, sapkw21c03 import parameter i_external_call, 4 million record limit removed, symptom db2/400-specific corrections, form build_viewfor temporary views, evi stage 2 support included
Related Notes : 
       
| 644266 | iSeries: Missing aggregate indexes after change run | 
| 527792 | iSeries: SQL-5001 Deleting in fact tables | 
| 527654 | iSeries: Query terminates with SQL-104 | 
| 518780 | iSeries: Termination during condensing | 
| 407530 | AS/400: BW 2.0B/2.1C on DB2/400: DBDIFF Handling | 
| 407528 | AS/400: DB2/400 indexing Schema of the BW Fact Tables | 
| 389998 | iSeries: New implementation of condensor | 
| 385831 | AS/400: "L_CURLEVEL" is already declared. | 
| 381888 | MultiCube query processing on DB400 | 
| 375132 | Performance optimization for InfoCube condensation | 
| 374840 | SAPBWNews BW 2.0B Support Package 14 | 
| 364382 | AS/400: Statement "CURLEVEL" is not defined | 
| 360862 | AS/400: Error in RSDRH_DB400_ROUTINES | 
| 353981 | BW2.0B: Error after hierarchy processing | 
| 352660 | AS/400: Short Dump with LISTCUBE | 
| 330604 | AS/400: ABAP runtime error PERFORM_NOT_FOUND | 
| 329846 | AS/400: MESSAGE_TYPE_X when summarizing | 
| 328757 | System error in SAPLRSDRH / INSERT_TMBTAB_ENTRY-1- | 
| 328131 | Exception condition SQL_ERROR in RSDU_EXEC_SQL_DB4 | 
| 324478 | AS/400: SQL0101 SQL statement too long or complex | 
| 316651 | SAPBWNews for BW 2.0B Support Package 11 | 
| 307550 | AS/400: Error in materialized query | 
| 307470 | AS/400: Fix checks on tables | 
| 306582 | AS/400: Changes in condenser | 
| 305706 | AS/400: Fix in code generation CREATE_WHERE_CLAUSE | 
| 184905 | Collective note Performance BW 2.0 | 
| 110934 | SAP BW Support Packages |