2453066 - Error message during processing in BI due to data misalignment

An InfoPackage request fails with an "Error message during processing in BW" or "Error message during processing in BI". When investiating further, you find one of the following errors:

• Error 'The argument (...) cannot be interpreted as a number' when assigning application structure, line (...), contents (...)
  Message no. RSDS016
• Record (...):Contents (...) from field (...) cannot be converted in type (...) ->longtext
  Message no. RSAR197
• Error in an arithmetic operation in record (...)
  Message no. RSAR117

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."

• SAP Netweaver

RSAR, 197, 117, RSDS, 016, PSA, invalid, character, extractor, ECC, load, unicode, CONVT_NO_NUMBER, SAPLCJPN, CONVERSION_EXIT_KONPR_OUTPUT , KBA , BC-BW , BW Service API , BW-WHM-DST , Data Staging , Problem