Aspose Word - Exception while comparing two documents

Aspose.Words Product Family
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1

Hi,
We are a licenced Aspose User and we are using Aspose Words to compare word documents using Document.Compare method. We have noticed that this method is broken in the latest version of aspose. The version that we are currently using for Aspose Word is 25.2.0. I am attaching the word files for your reference. The method throws the following exception: “Object reference not set to an instance of an object”
This is a very critical issue for our application and would really appreciate if you can help us in this regard at your earliest. Thanks.

1692×648 98.3 KB

v1.docx (811.9 KB)

v2.docx (628.3 KB)

2

@omer.asalm

It seems you are encountering an “Object reference not set to an instance of an object” exception while using the Document.Compare method in Aspose.Words. This issue can arise due to several reasons, particularly if either of the documents you are trying to compare has revisions before the comparison is initiated.

Here are some steps you can take to troubleshoot and potentially resolve the issue:

  1. Check for Revisions: Ensure that neither of the documents has any revisions before calling the Compare method. If either document contains revisions, the method will throw an exception. You can check for revisions using the get_Revisions()->get_Count() method.

  2. Sample Code: Here’s a basic example of how to use the Compare method correctly:

    Document docA = new Document("path/to/v1.docx");
Document docB = new Document("path/to/v2.docx");

// Ensure both documents have no revisions
if (docA.get_Revisions()->get_Count() == 0 && docB.get_Revisions()->get_Count() == 0)
{
    docA.Compare(docB, "authorName", DateTime.Now);
    // Check for revisions after comparison
    if (docA.get_Revisions()->get_Count() > 0)
    {
        Console.WriteLine("Documents are not equal.");
    }
    else
    {
        Console.WriteLine("Documents are equal.");
    }
}
else
{
    Console.WriteLine("One or both documents have revisions. Please remove them before comparing.");
}

  3. Update Aspose.Words: If you are using an older version (25.2.0), consider updating to the latest version of Aspose.Words, as there may have been bug fixes or improvements related to the Compare method.

  4. Contact Support: Since this is a critical issue for your application, if the problem persists after trying the above steps, I recommend reaching out to Aspose support directly with the details of your issue, including the specific versions and the documents you are trying to compare.

If you have any further questions or need additional assistance, feel free to ask!

3

@omer.asalm
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): WORDSNET-27945

You can obtain Paid Support Services if you need support on a priority basis, along with the direct access to our Paid Support management team.