Fix Acrobat This File Cannot Be Found Error After Illustrator PDF Save
Question details
Users encounter a 'This file cannot be found' error in Adobe Acrobat immediately after saving a PDF in Adobe Illustrator and having it set to open automatically.

- Product
- Adobe Acrobat and Illustrator
- Device & OS
- not provided
- Scenario
- Saving a PDF document in Illustrator and setting it to automatically open in Acrobat upon completion.
- Observed behavior
- Acrobat launches but fails to open the document, displaying a 'cannot be found' error. This often occurs when saving to mapped network drives or when network optimization settings interfere.
Ensure you have saved a copy of your Illustrator project to a local directory on your computer to prevent data loss before modifying your application settings.
Save to a Local Directory and Disable Network Optimization
Bypassing mapped network drives and disabling Illustrator's beta network optimization features resolves the most common causes of this file path error.
Network latency and mapped drives can interrupt the handoff between Illustrator and Acrobat. Disabling experimental features that try to optimize these connections usually restores normal functionality.
Instead of saving your PDF to a mapped network drive, choose a local folder such as your Desktop or Documents folder.
In Adobe Illustrator, navigate to Edit > Preferences (Windows) or Illustrator > Settings (Mac), and select the File Handling & Clipboard tab.
Find and uncheck the option labeled 'Optimize File Open and Save Time on Slow Networks (Beta)'.
Save your PDF again and allow Acrobat to open it automatically to confirm the error is gone.

Adjust Acrobat Storage and Security Settings
Modifying Acrobat's online storage preferences and security settings can prevent it from misinterpreting the local path of newly generated files.
Prevent Adobe Application Conflicts
Running multiple versions of Acrobat or keeping the source file locked in Illustrator can cause opening errors.
Open and Edit PDFs Easily with WPS Office
Bypass Acrobat-specific network and synchronization errors by using WPS Office to view and manage your exported PDFs. WPS PDF offers a fast, lightweight, and highly reliable alternative for all your document needs.
- 1. Download WPS Office: Visit the official WPS website to download and install WPS Office for free on your device.
- 2. Launch the Application: Open WPS Office and navigate to the 'PDF' tab on the home interface.
- 3. Open Your PDF: Click 'Open', browse to the folder containing your saved Illustrator PDF, and select the file to view it without errors.
- 4. Set as Default Viewer: Right-click any PDF on your computer, choose 'Open with', and select WPS Office to make it your default PDF viewer.

Frequently Asked Questions
Why does Acrobat display a weird prefix like 'ai15704658569_' in the filename?
This is a known glitch in certain Adobe updates where temporary cache prefixes are erroneously appended to the document tab display name in Acrobat, even though the actual file saved on your drive retains the correct name.
Does saving to a mapped network drive always cause the 'file cannot be found' error?
Not always, but mapped network drives can cause path resolution or latency issues when Illustrator attempts to hand the file off to Acrobat. Saving locally or using a direct UNC path resolves this.
Should I keep 'Optimize File Open and Save Time on Slow Networks' disabled permanently?
If you frequently work on network drives and encounter file-not-found errors, it is highly recommended to leave this beta feature disabled until Adobe releases a more stable update.




