Solution : https://service.sap.com/sap/support/notes/717762 (SAP Service marketplace login required)
Key words :
10 content import support package 14, 0b import support package 20, charsize charlength reason, char variables differ, 50 import support package 02, 1 content support package 14, unpacking query results, 0b support package 20, short dump conne_import_wrong_comp_leng, support package
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| 692636 | SAPBWNews BW SP02 NW'04 Stack 02 RIN |
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| 601051 | SAPBWNews BW 3.1 Content Support Package 14 |