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

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This exception has no message.
java.lang.NullPointerException:
at com.solarmetric.rd.kodo.impl.jdbc.meta.compat.ImportTool.mapForeignKey(ImportTool.java:336)
at com.solarmetric.rd.kodo.impl.jdbc.meta.compat.ImportTool.mapField(ImportTool.java:207)
at com.solarmetric.rd.kodo.impl.jdbc.meta.compat.ImportTool.importMappings(ImportTool.java:78)
at com.solarmetric.rd.kodo.impl.jdbc.meta.compat.ImportTool.run(ImportTool.java:408)
at com.solarmetric.rd.kodo.impl.jdbc.meta.compat.ImportTool.main(ImportTool.java:385)

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