HTTP status 400 when sending data to the Data Distribution Engine on the /inputfiles/upload API endpoint

Symptom: a data extraction job fails, with HTTP return code 400 on the /inputfiles/upload API endpoint.

Solution: make sure to tick the "Data in request" checkbox in the relevant configuration transaction (/VDB/TABLEAU_CUST, /VDB/SQL_CUST, /VDB/QLIKVIEW_CUST or SM30 editing table /VDB/T_HIVE_ST):