Solution : https://service.sap.com/sap/support/notes/374845 (SAP Service marketplace login required)
Key words : 
form rsdrc_cube_data_get_olapplease read note 422539, special object type, produces dump dynpro_send_in_background, query termination x299, record mode 'a', type cha fields, convert psa tables, loading transaction data, bw patches solution, import error corrections
Related Notes : 
       
| 531700 | BW 2.0B: Information for Support Packages | 
| 413199 | |
| 413077 | |
| 412476 | Restriction to posted values during filter value selection | 
| 412438 | |
| 412434 | |
| 412280 | Display all URLs in the tree of the BEx browser in the Web | 
| 412128 | |
| 411372 | |
| 410684 | |
| 409565 | |
| 409543 | |
| 408659 | |
| 408282 | |
| 408258 | Query with variable 0S_RQMRC displays no data | 
| 407957 | Endless loop for BEx browser in Web (RSBB_WWW_HTML_MERGER) | 
| 407486 | |
| 406343 | |
| 406326 | BEx Browser in Web has problems with long URL | 
| 403461 | |
| 403436 | |
| 402336 | |
| 401617 | |
| 399704 | Calling SAP transactions from within the BEx Browser | 
| 388888 | Export DataSource: Termination at time char with attributes | 
| 375871 | Partitioning of InfoCubes using 0FISCPER | 
| 318352 | BEx browser in the Web |