Excel cannot open the file as file format or file extension is invalid

Aspose.Cells Product Family
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1

i opened online aspose-editor.
Edit Excel Files Free Online
i used 2 files for testing. an xltx file and xltm file.

i selected a cell and applied fill color. Then i downloaded the file. when i opened the file i received below error
image.png (32.7 KB)

image.png (32.6 KB)

Attached files used for testing
files.zip (12.9 KB)

please let us know what can be done to fix this issue

2

@divine1

It seems you’re encountering an issue with opening the files you edited using the Aspose online editor. The error message indicates that the file format or extension is invalid after downloading the modified files.

Here are a few troubleshooting steps you can follow:

  1. Check File Extensions: Ensure that the files you are trying to open have the correct extensions. For example, use .xltx for Excel templates and .xltm for macro-enabled templates.

  2. Re-download the Files: Sometimes, the download process may not complete correctly. Try re-downloading the files from the Aspose editor and see if the issue persists.

  3. Open in Different Excel Versions: If possible, try opening the files in a different version of Excel. Compatibility issues can arise with specific versions.

  4. Validate the Content: If you have access to the original files, compare the content of the modified files with the originals to ensure that the changes were applied correctly.

  5. Use Aspose.Cells API: If you are familiar with programming, you can use the Aspose.Cells API to programmatically open and manipulate the files. This can help identify if the issue is with the file itself or the way it was edited.

If the problem continues, consider reaching out to the Aspose support forum with details about the issue, including the specific steps you took and any error messages you received.

3

@divine1
By using sample files for testing, we can reproduce the issue. The result file crashes after editing with Online Excel Editor.

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): CELLSNET-59270

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.

1 Like
4

@John.He

Thank you for the quick action.

Adding this just to avoid any confusions, we are using aspose-cell-java. our tags are also pointing to aspose-java.

5

@divine1
Thank you for your feedback. We have moved the issue CELLSNET-59270 to CELLSJAVA-46536.

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): CELLSJAVA-46536

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.

6

want to check on the release plan for this
Issue ID(s): CELLSJAVA-46536
can we expect this to be fixed in upcoming release?
25.11

7

@Ghani0303
We are pleased to inform you that your issue has been resolved. The fix will be included in our upcoming release (Aspose.Cells for Java v25.11) that we plan to release in the first half of November 2025. You will be notified when the next version is released.

8

thanks john for the quick update.

9

@Ghani0303
You are welcome! Please feel free to contact us if you face any issue.