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Exception with message "Object reference not set to an instance of an object. " at ?.?.?()

Conversion of word file to PDF failed with Aspose.word (ver.10.6). Following is the exception and code snippet. Can you please provide fix asap?
        public static void ConvertWordToPdf(string sourceFilePath, string destinationFilePath)
        Aspose.Words.Document doc = new Aspose.Words.Document(sourceFilePath);
    }</span><span style="white-space: pre-wrap; ">

Timestamp: 1/26/2012 10:43:14 PM
Message: HandlingInstanceID: 64fec8a0-e413-403f-ab95-34e306e0eb73

An exception of type ‘System.NullReferenceException’ occurred and was caught.
2012-01-26 17:43:14Z
System.NullReferenceException, mscorlib, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089
Object reference not set to an instance of an object. Aspose.Words in file: C:\WINDOWS\TEMP\IntraLinks\3c97938c-5bd6-4956-99b4-8d5bbd4f15ae.doc System.Collections.ListDictionaryInternal Boolean 䲢() at Ἕ.䲑.䲢() at Ἕ.䲑.MoveNext() at Ἕ.ӧ.䒵(Document ๗, Ө 㒱) at Aspose.Words.Document.UpdatePageLayout() at Aspose.Words.Document.get_ӧ() at Aspose.Words.Document.SaveToPdf(String fileName) at Intralinks.Common.Utilities.AsposeConverter.ConvertWordToPdf(String sourceFilePath, String destinationFilePath) in c:\ilbuilds\pdfconv\build_trunk\CommonUtilities\AsposeConverter.cs:line 39 at Intralinks.Common.Utilities.CommonUtilities.ConvertOfficeDocsToPDF(String sourceFile, String destinationFolder, Boolean useOriginalFileName) in c:\ilbuilds\pdfconv\build_trunk\CommonUtilities\CommonUtilities.cs:line 1357 Category: Logging Exception Priority: 1 EventId: 100 Severity: Error Title:Enterprise Library Exception Handling Machine: WDPDPF01 Application Domain: ILPDFConversionService.exe Process Id: 3216 Process Name: C:\PDFConvService\WOODDALE.pdfconv\instance2\Release\ILPDFConversionService.exe Win32 Thread Id: 7052 Thread Name: Extended Properties: Product Version - 3.0.24944.0

Hi Viral,

Thanks for your query. Please use the latest version of Aspose.Words for .NET 11.0.0. If you still face problem then please share your document for investigation purposes.