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javax.xml.transform.TransformerException: java.lang.NullPointerException at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2341) at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:393) at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:247) at org.apache.xalan.templates.ElemForEach.transformSelectedNodes(ElemForEach.java:420) at org.apache.xalan.templates.ElemForEach.execute(ElemForEach.java:259) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemElement.constructNode(ElemElement.java:338) at org.apache.xalan.templates.ElemElement.execute(ElemElement.java:287) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemTemplate.execute(ElemTemplate.java:393) at org.apache.xalan.templates.ElemCallTemplate.execute(ElemCallTemplate.java:247) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemChoose.execute(ElemChoose.java:140) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemIf.execute(ElemIf.java:161) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:395) at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:177) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.transformer.TransformerImpl.transformToString(TransformerImpl.java:2019) at org.apache.xalan.templates.ElemComment.execute(ElemComment.java:85) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:682) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2202) at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1276) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:673) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1192) at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1170) at org.apache.xalan.xslt.Process.main(Process.java:987)Caused by: java.lang.NullPointerException at org.apache.xml.serializer.SerializerBase.getPrefix(SerializerBase.java:841) at org.apache.xalan.templates.ElemAttribute.resolvePrefix(ElemAttribute.java:130) at org.apache.xalan.templates.ElemElement.execute(ElemElement.java:240) at org.apache.xalan.templates.ElemAttribute.execute(ElemAttribute.java:107) at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2336) ... 60 more