Problem with converting a specific docx to md

GroupDocs.Conversion Product Family
1

Hey, I am experiencing a problem with a specific docx document when trying to convert to md. I keep getting this error:

GroupDocs.Conversion.Exceptions.GroupDocsConversionException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at .(Exception , ConverterSettings ,  ) at .(CancellationToken ) at ..() at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) --- End of stack trace from previous location --- at System.Threading.ExecutionContext.RunFromThreadPoolDispatchLoop(Thread threadPoolThread, ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot, Thread threadPoolThread) --- End of inner exception stack trace --- at ..(Exception ) at System.AggregateException.Handle(Func2 predicate)
 at .(CancellationToken ) at GroupDocs.Conversion.Converter.(CancellationToken ) at GroupDocs.Conversion.Converter.Convert(Func2 targetStreamProvider, ConvertOptions convertOptions, CancellationToken cancellationToken)

Sadly I cant share the document currently. I was wondering if you could help me understand why this might be happening and what could be the issue.
Thanks,
Dan

2

@dangilboa

It appears you are encountering a NullReferenceException while attempting to convert a specific DOCX document to Markdown (MD) using GroupDocs.Conversion. This error typically indicates that the code is trying to access an object that hasn’t been initialized.

Here are several potential reasons for this issue along with suggested solutions:

  1. Document Content: The DOCX file may contain unsupported elements or be corrupt. Open the document in Microsoft Word to check for any issues.

  2. Library Version: Verify that you are using the latest version of the GroupDocs.Conversion library, as newer releases may contain bug fixes.

  3. Conversion Options: Examine the conversion options you are using. If you have specified any custom settings, try reverting to the default settings to see if the issue persists.

  4. Error Handling: Implement error handling in your code to catch exceptions and log detailed information about the document being processed. This can help identify if a specific part of the document is causing the issue.

  5. Testing with Other Documents: Attempt to convert other DOCX files to determine if the problem is isolated to this specific document or if it occurs with others as well.

If the issue continues, consider reaching out to the GroupDocs support forum with details about your implementation and the characteristics of the document in question.

3

The document seems completely fine, i was able to open it successfully on my computer.
All other docx I try work completely fine, so it must be something specific with this document.
We are using version 25.8.0

4

@dangilboa

Since other DOCX files convert fine, the issue is likely related to specific content/structure in this document (e.g., embedded objects, tracked changes, or custom XML parts). To reproduce and investigate, we’ll need:

  1. The problematic DOCX file (or a stripped-down version that still causes the error).
  2. The exact sample conversion code you’re using.

Once we have these, we can check why the converter is throwing the NullReferenceException.