Error loading file", Not a diagram file (error on line 1 at column 1: Start tag expected, '<' not found)

[iPriyanshuRanjan]

Description:

I am facing an issue when trying to open both local files and online available Draw.io files using the "Open with" option. When selecting the Draw.io application to open the document, I encounter the following error:

Error:
Not a diagram file (error on line 1 at column 1: Start tag expected, '<' not found)

Questions:

• How can I fix this issue?
• Is there a known workaround for this problem?
• Has anyone else experienced this issue with the latest version of Draw.io?

Steps to Reproduce:

1. Open a local Draw.io file or an online Draw.io file.
2. Right-click and select "Open with".
3. Choose the Draw.io application to open the file.

Expected Behavior:

The Draw.io file should open correctly without any errors.

Actual Behavior:

An error message is displayed:
Not a diagram file (error on line 1 at column 1: Start tag expected, '<' not found)

Additional Information:

• The issue persists even after updating to the latest version of Draw.io.
• I have confirmed that the file is a valid Draw.io diagram and has the correct file extension.
• I have reinstalled and updated Draw.io, but the issue is still not resolved.

Environment:

• Draw.io version: 26.0.9
• Operating System: Windows 11

Screenshots:

[davidjgraph]

could you attach the file zipped up?

[iPriyanshuRanjan]

Hi @davidjgraph,

Here is the zipped Draw.io file as requested. You can download it by clicking on the link below.

Download the zipped Draw.io file

Let me know if you need any further details.

[alderg]

We need the diagram file (*.drawio).

[iPriyanshuRanjan]

Hi @alderg ,

Unfortunately, I am unable to share the Draw.io file due to policy restrictions. However, I would appreciate any guidance on troubleshooting this issue.

Could you suggest any additional troubleshooting steps to resolve this issue?

Thanks for your help!

[alderg]

Try https://jgraph.github.io/drawio-tools/tools/convert.html, drop the file into the text area and click Correct mxFile

[iPriyanshuRanjan]

Thanks @alderg for that tool to verify my Draw.io file. Now it's working! 🎉

@alderg @davidjgraph