Solution : https://service.sap.com/sap/support/notes/1006039 (SAP Service marketplace login required)
Key words :
sapbwnews bw support package 20 netweaver'04 stack 20, system returns invalid characters, sap bw releases 3, additional support packages, 50 import support package 20, attached file rrt_mdx_schema_11, attached correction instructions, support package, solution bw 3, invalid character
Related Notes :
| 986891 | SAPBWNews BW Support Package 20 NetWeaver '04 Stack 20 RIN |
| 968347 | CELL PROPERTIES in XML/A and multidimensional output |