2451149 - CX_SY_REF_IS_INITIAL exception in DTP with "Serial extraction and processing of source package"

Symptom

Executing a DTP with processing mode "Serial extraction and processing of source package", produces one of the following messages in the 31st data package:

An exception with the type CX_SY_REF_IS_INITIAL occurred, but was neither handled locally, nor declared in a RAISING clause
cursor_new: too many (>30) native SQL cursors opened -> DS_CURSERR
MESSAGE_TYPE_X dump in CHECK_SM12

Environment

SAP Business Warehouse (SAP BW) 7.0
SAP BW 7.01 (SAP BW 7.0 EHP 1)
SAP BW 7.02 (SAP BW 7.0 EHP 2)
SAP BW 7.03 (SAP BW 7.0 EHP 3)
SAP NetWeaver 7.3
SAP NetWeaver BW 7.31 (SAP NW BW 7.3 EnhP 1)
SAP NetWeaver BW 7.40
SAP NetWeaver 7.40
SAP NetWeaver 7.50
SAP BW/4HANA

Product

SAP BW/4HANA 1.0 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

Keywords

RS_EXCEPTION000, RS_EXCEPTION, 000, RSAR, 051, SAPLRSSM, MESSAGE_TYPE_X, CHECK_SM12, Enq hold by WP/My WP - Host/My Host, TESTDATRNRPART , KBA , BW-WHM-DST-DTP , Data Transfer Process , BW-WHM-DST , Data Staging , BW-WHM-DBA-DSO , DataStore Object (classic) , BW-WHM-DBA-OHS , Open Hub Service , Problem

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