Fix Reader-Enabled PDF Cannot Be Signed in Acrobat 2017
Question details
The user is unable to sign a LiveCycle ES4 PDF form in Adobe Reader DC or Acrobat 2017 after applying Reader Extensions using Acrobat 2017 Pro.
- Product
- Adobe Acrobat 2017 Pro / LiveCycle ES4
- Device & OS
- not provided
- Scenario
- Applying Reader Extensions to a LiveCycle form to enable end-users to digitally fill and sign the document in standard Adobe Reader software.
- Observed behavior
- The signature fields work correctly when extensions are applied via Acrobat XI Pro, but the form cannot be signed if the extensions are applied using Acrobat 2017 Pro.
Before modifying your form's security settings, ensure you retain the original unextended LiveCycle ES4 XDP or PDF file, as applying and stripping extensions multiple times can corrupt XFA form structures.
Verify Settings and Reapply Reader Extensions Using a Compatible Version
Compare settings between Acrobat XI Pro and Acrobat 2017 Pro to ensure proper extension application, or use the compatible legacy version.
LiveCycle ES4 forms rely on specific XFA (XML Forms Architecture) frameworks. Acrobat 2017 introduced structural changes to how Reader Extensions and security policies are handled, which can occasionally break legacy XFA signature fields that worked perfectly in Acrobat XI.
Open the original, unextended LiveCycle ES4 form directly in Adobe Acrobat 2017 Pro.
Navigate to 'File' > 'Save as Other' > 'Reader Extended PDF' > 'Enable More Tools (Includes form fill-in & save)'.
Ensure the signature fields within the LiveCycle Designer were explicitly configured as supported XFA signature fields, rather than standard Acroform fields.
If the issue persists in Acrobat 2017, use Acrobat XI Pro to apply the Reader Extensions, as it maintains native compatibility with LiveCycle ES4 form properties.
Update Acrobat 2017 to the Latest Patch Release
Adobe regularly releases patches that address Reader Extension bugs and signature field compatibility with XFA forms.
Use WPS Office to Fill and Sign PDF Forms Effortlessly
Avoid complex extension errors and version compatibility issues. With WPS PDF, you can easily open, fill out, and apply digital or visual signatures to PDF forms without needing special 'Reader Enabled' privileges from older software.
- 1. Install WPS Office: Download and install WPS Office, then open your unextended PDF form using the WPS PDF application.
- 2. Access the Signature Tool: Navigate to the 'Fill & Sign' or 'Protect' tab located on the top ribbon.
- 3. Create Your Signature: Click 'Sign' to create or insert your verified digital signature, typed name, or handwritten image signature.
- 4. Place and Save: Click on the required signature field to place your signature perfectly, then save the finalized document.
Frequently Asked Questions
Why do Reader Extensions break signature fields in Acrobat 2017?
Acrobat 2017 introduced architectural changes to how security policies and extended privileges are embedded compared to Acrobat XI. Older LiveCycle ES4 forms may contain legacy XFA signature configurations that conflict with Acrobat 2017's updated extension protocols.
Can I digitally sign a LiveCycle form without applying Reader Extensions?
Standard Adobe Reader historically requires extensions to sign or save complex XFA forms. However, using modern third-party PDF software or upgrading the form infrastructure to AEM Forms can often bypass these legacy extension requirements.
How do I remove corrupted Reader Extensions from a PDF?
To remove existing extensions, open the PDF in Adobe Acrobat Pro and navigate to 'File' > 'Save a Copy'. This creates a fresh, unextended version of the PDF form that you can modify or re-extend cleanly.
