2662021 - DB6: JSizeCheck failed with SQL1092N during system copy

Using SWPM to do System Copy based on AS Java, during the phase Database Instance Export, execution of JSizeCheck tool failed with error SQL1092N:

jsizecheck.java.log:
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com.sap.sql.exception.OpenSQLException: DB2 SQL Error: SQLCODE=-1092, SQLSTATE= , SQLERRMC=SAP<SID>DB, DRIVER=x.xx.xx
OpenSQLExceptionCategories: []
at com.sap.sql.exception.SQLExceptionFactory.createOpenSQLException(SQLExceptionFactory.java:167)
at com.sap.sql.exception.SQLExceptionFactory.wrapChainedSQLException(SQLExceptionFactory.java:72)
at com.sap.sql.jdbc.direct.DirectPooledConnection.processSQLExceptionJava6(DirectPooledConnection.java:1000)
at com.sap.sql.jdbc.direct.DirectPooledConnection.processSQLException(DirectPooledConnection.java:926)
at com.sap.sql.jdbc.direct.DirectConnection.processSQLException(DirectConnection.java:1544)
at com.sap.sql.jdbc.direct.DirectPreparedStatement.executeQuery(DirectPreparedStatement.java:318)
at com.sap.sql.jdbc.direct.DirectPreparedStatement.executeQuery(DirectPreparedStatement.java:271)
at com.sap.inst.jsizecheck.db6.Db6SizeProvider.readDatabaseSize(Db6SizeProvider.java:66)
at com.sap.inst.jsizecheck.SizeChecker.checkSize(SizeChecker.java:278)
at com.sap.inst.jsizecheck.SizeChecker.doRun(SizeChecker.java:213)
at com.sap.inst.jsizecheck.SizeChecker.run(SizeChecker.java:176)
at com.sap.inst.jsizecheck.JSizeCheck.startAppJob(JSizeCheck.java:279)
at com.sap.inst.lib.app.CommandLineApp.doMain(CommandLineApp.java:111)
at com.sap.inst.jsizecheck.JSizeCheck.main(JSizeCheck.java:314)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sap.engine.offline.OfflineToolStart.main(OfflineToolStart.java:162)
...

SAP on IBM Db2 for Linux, UNIX, and Windows

system copy, SWPM, jsizecheck, SQLCODE=-1092, SQLERRMC, AS-JAVA , KBA , BC-DB-DB6 , DB2 Universal Database for Unix / NT , BC-DB-DB6-INS , Installation SAP System , Problem