2175988 - Error: "..CRFC error: No authorization to log on to the target system (error code 1).>. .." running a job in Data Services

A job fails trying to connect to SAP application server with the following message in Data Services:
Cannot connect to SAP Applications datastore <(><<)>R3_DS> using host <(><<)>Server.com>, client <(><<)>900>, user<(><<)>bo_poc_user>, and system number <(><<)>0: CRFC error: No authorization to log on to the target system (error code 1).>. Please make sure the SAP server is running and the login information is correct.

Data Services

SAP Connection error, DS, BODS, DI, BODI, SAP Application permissions , KBA , EIM-DS-SAP , SAP Interfaces , EIM-DS-EXE , Job Execution , Problem