D5 Project File Corrupted – Backup Opens but Cannot Save

Hi D5 Team,

I am facing a serious issue with my D5 Render project file.

My project file size is around 4.3GB . Earlier, the model was not visible in the project, and now I tried opening the backup file . The backup file opens successfully, and I can see the project/scenes, but I cannot save or Save As the file.

Whenever I try to save, D5 shows this error:

“Save Failed – The file has been moved or is corrupted and cannot be saved. Move the project file back to the original location and try again.”

I have already tried:

  • Opening the backup file
  • Saving in the same location
  • Using Save As
  • Moving the file to another local folder
  • Restarting D5
  • Checking the Imported/Object panel
  • Trying different save locations

But nothing is working. The file opens, but it does not allow me to save or create a new saved copy.

This is an important project with multiple scenes, assets, terrain/context, and a lot of work already completed. Please help me recover the file or suggest any method to save/export/repair the project.

I have attached the screenshot of the error message.

Thank you.