java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at schemacrawler.tools.text.operation.Query.getOrderByColumnsListAsString(Query.java:54)
at schemacrawler.tools.text.operation.Query.getQueryForTable(Query.java:135)
at schemacrawler.tools.text.operation.OperationHandler.handle(OperationHandler.java:170)
at schemacrawler.tools.text.operation.OperationExecutable.executeOn(OperationExecutable.java:85)
at schemacrawler.tools.executable.SchemaCrawlerExecutable.executeOn(SchemaCrawlerExecutable.java:73)
at schemacrawler.tools.executable.BaseExecutable.execute(BaseExecutable.java:83)
at schemacrawler.tools.commandline.SchemaCrawlerCommandLine.execute(SchemaCrawlerCommandLine.java:179)

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