Fix Operation Not Permitted When Submitting PDF Forms
Question details
Users encounter an Operation not permitted error when attempting to submit a completed PDF form using a mailto button.

- Product
- Adobe Reader / Adobe Acrobat
- Device & OS
- not provided
- Scenario
- Filling out an interactive PDF form created in InDesign and clicking the mailto Submit button to email the results.
- Observed behavior
- Clicking the Submit button triggers an Operation not permitted warning, preventing the filled form from being sent via email.
Ensure you have the original, editable version of the PDF form in Adobe Acrobat, as you will need to re-save it with extended rights to fix this issue.
Enable Reader Extended Rights in Adobe Acrobat
Granting extended Reader rights allows users on older versions like Reader 9 to execute specific form functions, such as saving and submitting data.
Older versions of PDF readers strictly limit what users can do with interactive forms unless the document author explicitly grants permission. By extending these rights in Acrobat, you bypass the restrictions causing the submission failure.
Open your interactive PDF form file using the full version of Adobe Acrobat.
Navigate to the top menu and select File > Save As Other > Reader Extended PDF.
Click on Enable More Tools (or Enable Form Fill-in and Save, depending on your Acrobat version).
Save the new PDF file and distribute this updated version to your recipients so they can successfully use the Submit button.

Advise Recipients to Update Their PDF Reader
Modern PDF forms created in recent software versions require current PDF readers for full compatibility and security without needing extended rights.
Use WPS PDF to Fill and Share PDF Forms Easily
Avoid compatibility issues and restrictive permission errors associated with outdated PDF software. WPS Office includes a powerful, modern PDF reader and editor that seamlessly handles form filling, saving, and sharing.
- 1. Open the form in WPS PDF: Launch WPS Office and open your interactive PDF form document.
- 2. Fill out the fields: Click on the interactive text fields, checkboxes, or drop-down menus to enter your information smoothly.
- 3. Save the document: Click the Save icon to ensure all your inputted data is securely preserved locally.
- 4. Share via email: Use the built-in Share function in WPS PDF to attach the filled form to your default email client and send it directly.

Frequently Asked Questions
Why does the Operation not permitted error appear in Adobe Reader 9?
This error typically occurs because older versions of Adobe Reader restrict certain interactive features, such as saving form data or executing mailto commands, unless the PDF author explicitly grants Extended Reader Rights.
What is a mailto Submit button in a PDF?
A mailto button is an interactive form element designed to automatically launch the user's default email client, generate a new email addressed to the form's creator, and attach the filled PDF data or document.
Can I fix this error without Adobe Acrobat?
If you do not have the paid version of Adobe Acrobat to extend reader rights, the best alternative is to instruct form recipients to use a modern, updated PDF application like WPS PDF, which does not enforce these outdated restrictions.




