https://userapps.support.sap.com/sap/support/knowledge/en/3016849
3016849 - An exception with the type CX_SY_OPEN_SQL_DB was raised, but was not handled locally or...
As a part of the procedure Rapid Activation for SAP Fiori in SAP S/4HANA 1909 (for example: SAP Note 2834415 ) during the run of task list...