we are getting below exception
exception in thread "main" java.lang.RuntimeException: java.lang.NullPointerException
at com.aspose.words.zzZJ9.zzXx9(Unknown Source)
at com.aspose.words.zzZJ9.zzWZJ(Unknown Source)
at com.aspose.words.zzWeC.zzWZJ(Unknown Source)
at com.aspose.words.zzWeC.zzWZJ(Unknown Source)
at com.aspose.words.zzZKh.zzWBn(Unknown Source)
at com.aspose.words.zzZKh.zzXTn(Unknown Source)
at com.aspose.words.zzZKh.zzWBn(Unknown Source)
at com.aspose.words.zzZbg.zzZO7(Unknown Source)
at com.aspose.words.zzZbg.zzW07(Unknown Source)
at com.aspose.words.zzZEn.getWidth(Unknown Source)
at com.aspose.words.zzYf2.zzZjk(Unknown Source)
at com.aspose.words.zzi6.zzZU(Unknown Source)
at com.aspose.words.zzYpe.zzZQk(Unknown Source)
at com.aspose.words.zzYpe.zzXTn(Unknown Source)
at com.aspose.words.zzYpe.zzWLh(Unknown Source)
at com.aspose.words.zzW8T.zzWZJ(Unknown Source)
at com.aspose.words.zzW8T.zzYQa(Unknown Source)
at com.aspose.words.zzXPx.zzYD8(Unknown Source)
at com.aspose.words.zzZnN.zzXx9(Unknown Source)
at com.aspose.words.zzZnN.zzZfm(Unknown Source)
at com.aspose.words.zzZnN.zzWBn(Unknown Source)
at com.aspose.words.zzWLQ.zzWZJ(Unknown Source)
at com.aspose.words.zzWLQ.zzWZJ(Unknown Source)
at com.aspose.words.zzMO.zzWNa(Unknown Source)
at com.aspose.words.zzMO.zzWYI(Unknown Source)
at com.aspose.words.zzMO.zzWZJ(Unknown Source)
at com.aspose.words.zzWQo.zzZaV(Unknown Source)
at com.aspose.words.zzWQo.zzXTn(Unknown Source)
at com.aspose.words.zzWQo.zzYrK(Unknown Source)
at com.aspose.words.zz68.zzYzN(Unknown Source)
at com.aspose.words.zz68.zzYFL(Unknown Source)
at com.aspose.words.zz68.zzWNs(Unknown Source)
at com.aspose.words.zz68.zzYQa(Unknown Source)
at com.aspose.words.zzYE6.zzYlo(Unknown Source)
at com.aspose.words.zzXB8.zzZO7(Unknown Source)
at com.aspose.words.zzZZJ.zzYlo(Unknown Source)
at com.aspose.words.zzYhg.zzXcb(Unknown Source)
at com.aspose.words.zzZTB.zzXVi(Unknown Source)
at com.aspose.words.Document.updatePageLayout(Unknown Source)
at com.aspose.words.zzT0.zzWKY(Unknown Source)
at com.aspose.words.zzmD.zzZ1t(Unknown Source)
at com.aspose.words.zzXeQ.zzBX(Unknown Source)
at com.aspose.words.zzXeQ.zzWZJ(Unknown Source)
at com.aspose.words.zzXeQ.zzYM8(Unknown Source)
at com.aspose.words.Document.zzMw(Unknown Source)
at com.aspose.words.Document.zzWYI(Unknown Source)
at com.aspose.words.Document.zzWZJ(Unknown Source)
at com.aspose.words.Document.save(Unknown Source)
at com.aspose.words.Document.save(Unknown Source)
at asposeConversion.ConversionDocx2PDF.ConvertPDFtoWord(ConversionDocx2PDF.java:45)
at asposeConversion.ConversionDocx2PDF.main(ConversionDocx2PDF.java:33)
Caused by: java.lang.NullPointerException
at com.aspose.words.zzWEN.zzY9h(Unknown Source)
at com.aspose.words.zzWEN.zzWXM(Unknown Source)
at com.aspose.words.zzWEN.getShapeRenderer(Unknown Source)
at com.aspose.words.zzWEN.zzZ7g(Unknown Source)
at com.aspose.words.zzWEN.zzWYI(Unknown Source)
at com.aspose.words.zzG7.zzWZJ(Unknown Source)
at com.aspose.words.zzG7.zzWZJ(Unknown Source)
at com.aspose.words.zzW60.zzZaQ(Unknown Source)
at com.aspose.words.zzW60.zzXJd(Unknown Source)
at com.aspose.words.zzZwQ.zzWZJ(Unknown Source)
at com.aspose.words.zzZwQ.zzWZJ(Unknown Source)
at com.aspose.words.zzZwQ.zzWB6(Unknown Source)
at com.aspose.words.zzZwQ.zzYHo(Unknown Source)
at com.aspose.words.zzZwQ.zzW1d(Unknown Source)
at com.aspose.words.zzZwQ.zzWZJ(Unknown Source)
at com.aspose.words.zzZqY.zzWZJ(Unknown Source)
at com.aspose.words.zzZJ9.zzXx9(Unknown Source)
... 50 more