How to recover lost annotations
The following might help.
- Do not reinstall the app, this might lose your ability to recover your file.
- Open your file explorer > within the address bar, edit and paste the following > press enter:
Replace the USERNAME with the appropriate username and press enter.
- To find your username:
- Open File Explorer (Win Key + E)
- Clear the field and paste "C:\Users" + Press Enter
- Copy the relevant folder username (it usually is your name, eg. "johndoe", not "Public")
- To find your username:
- Look through the scratch documents there(double click into the folders and corresponding PDFs), they are the temporary saves the app has made and some of them could have part/all of the annotations you've made.
If you weren't able to recover/find your file
If you aren't able to find your file there, try the next step if repairing the file helps or at least prevents future corruption.
How to repair a corrupt PDF
If you are having trouble opening a document in Drawboard PDF there may be some corruption/instability in the file.
If you would like to try to resolve the issue yourself, you can repair your corrupt PDF's by using a free online tool such as this one.
Note: These are suggestions and we are not liable for any potential results done by 3rd party tools.
How to repair a password locked PDF
There is no solution for this issue so far other than to replace it again with the original document.
Some users have reported success with 're-printing' the file again to restore stability. Exact steps can be found here: https://www.isumsoft.com/pdf/how-to-remove-bypass-pdf-permissions-password.html
Note: Do remember to use 'Save as PDF' and not 'Microsoft Print to PDF' as the results are very different.
Why does this even happen?
Due to the fragmented nature of PDFs and PDF creation, if the document started out with an error/corruption and was later annotated in Drawboard PDF, it might still fail later on.
Actions that could contribute to corruption in a PDF are:
- Using PDF apps that might not implement the PDF specification properly.
- Making changes to a PDF while hopping between multiple apps before saving it properly.
- Starting out with a document with a slight corruption, which might not show symptoms at first, but will fail after a certain threshold or document size.
Actions that reduce the likelihood of corruption or the ability to recover PDFs are:
- Clearing your currently open and recent documents often.
- Flattening your documents once confident of your edits.
- Saving your documents properly and closing programs, before opening the same file elsewhere.
- Saving your PDFs on your desktop to a cloud service that saves historical versions(eg. Google Drive for desktops).
We're doing our best we can to resolve document corruption but this is something that is an issue with multiple factors, mostly beyond our control. We look forward to the likelihood of these issues reducing over time with better best practices and improvements to the format.
Corrupt on overwrite of file with exact same filename
Update: This bug has been fixed in the latest release of Version 5.34.5, thank you to all our users who've worked hard at reporting and helping us reproduce this issue. Please update Drawboard PDF to the latest version to avoid this issue.
There is was a known bug that corrupted PDFs:
- Have an existing document open shown in your active documents saved in one folder.
- Proceed to open a document with the same file name but from a different folder from the initial document (eg. Downloads instead of Documents).
- This means the 2 documents are now both visible in the Tabs view.
- Then proceed to Save and overwrite one document over the other in the folder.
- You'd then be presented with the 'Attempting to overwrite an existing open file' (This is where the document becomes corrupted)
- Closing the document and opening it again will present the document as 'corrupted'
To avoid this happening for now:
- Consistently clearing the documents present in your Tabs view
- Avoiding saving documents with the same name when creating new documents in Drawboard PDF will prevent you from experiencing this bug. (eg. relevant to New Documents)
We apologize deeply apologies for not resolving this soon enough, we hope to resolve this soon.