2441717 - Stack file is rejected due to different kernel versions

Symptom

You are performing system update/upgrade with SUM. And you encountered an error like the following screen.

The error message is as below.

DEFINE-TARGET-SOURCE_01.LOG
Mar 10, 2017 10:49:32 PM [Info ]: Parsing of stack definition file E:\usr\sap\trans\EPS\in\Stack.xml has finished.
Mar 10, 2017 10:49:32 PM [Error ]: The following problem has occurred during step execution: com.sap.sdt.j2ee.tools.spxmlparser.SPXmlParserException: Cannot construct a support package stack from file E:\usr\sap\trans\EPS\in\Stack.xml.
The stack is rejected because there were found kernels with different versions and/or make variants in the stack: 7.21 / and: 7.21EXT / EXT .

Environment

System update/upgrade with SUM.

Product

SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.1 ; SAP NetWeaver 7.2 ; 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

The stack is rejected because there were found kernels with different versions and/or make variants in the stack, SUM, stack file, rejected, kernels with different versions , KBA , BC-UPG-PRP , Upgrade Preparation , Problem

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