Accessibility PAC 3.0 checker errors during the process of checking pdf data

[sanjit_3416]

Hi Team,

I am very upset about below marked errors in accesibility PDF, Running  in PAC 2024 version.

How to fixed this, many time I have try do fixed preflight running  fonts problem and optimised data already tried. please help do some thing.

" 

Stacktrace 1:
Operator 'f' not allowed in this current state.

Stacktrace 2:
Operator 'f' not allowed in this current state.

Stacktrace 3:
Operator 'f' not allowed in this current state.

Stacktrace 4:
Operator 'f' not allowed in this current state.

Stacktrace 5:
Operator 'f' not allowed in this current state."

As per my oberbation this errors may some incuptted data coming in pdf document. but the PDF has been splited smoothly and optimised as well and browsing data as well so, please resolving this issue if any ideas.have you? ThankYou Sanjit Kumar

[GeekyGirlRex]

Is it possible that the PDF is corrupt? Try saving it as an optimzed PDF and see if that solves the issue.

Choose File > Save As Other > Optimized PDF.

[vivacious_appreciator4381]

mail

[mr._9052]

I am facing repeated errors in PAC 2024 like:
Operator 'f' not allowed in this current state.
Tried fixing with Preflight, font adjustments, and PDF optimization, but the issue still exists.
The PDF opens fine in browsers, and we use such documents regularly on our site: salaryslipportal.com
This may be due to corrupted content streams. Any solution or guidance would be greatly appreciated.
Thanks,
Sanjit Kumar

[Tariq Ahmad]

Hi Sanjit,

Thank you for reaching out and sharing the details. I'm sorry for the delayed response. I hope you have already found an answer.
As the expert already suggested, the error message in PAC 2024 — “Operator ‘f’ not allowed in this current state”—typically points to corruption or structural issues in the PDF's content stream, often related to how text or fills are applied in the PDF’s low-level PostScript-like structure.

Here’s what we understand so far:

• The issue persists despite using Preflight, font adjustments, and optimization.

• The document renders fine in browsers, but fails PAC 2024 checks.

• The files are used on a live site (https://adobe.ly/4e4U2st), indicating the need for standards-compliant accessibility.

 Recommended Steps:

1. Use “Preflight > PDF/A validation” (instead of optimization alone)

   Try validating the PDF against PDF/A-2b or PDF/A-3b standards using Acrobat Pro’s Preflight tool. This can sometimes highlight underlying stream issues and guide toward corrective actions.

2. Regenerate the PDF with a known-good export tool

   If possible, regenerate the PDF from the source (e.g., Word, InDesign, or ERP tool) using the “Adobe PDF” printer or Acrobat plug-in, rather than a third-party tool. Some generators insert non-standard or malformed operators.

3. Run a PostScript Syntax Check

   If you’re familiar with command-line tools, Ghostscript or Adobe’s PDF Syntax Checker may reveal malformed objects or operators that Preflight skips.

4. Use MakeAccessible Wizard in Acrobat Pro

   This tool can help rebuild tags and structure, which may help avoid certain validation errors in PAC.

5. Consider flattening non-critical layers

   In some cases, complex layering or transparency can cause content stream errors. Try saving a copy using File > Save As Other > Optimized PDF, and enable:

   • “Discard user data”

   • “Clean up structure.”

   • “Flatten transparency” (if visually safe)

If the issue continues, we’d recommend sharing a sample file (with sensitive info redacted) so we can analyze the stream more deeply.

Let us know how it goes. 

~Tariq

[sanjit_3416]

Thanks Tariq, Sorry read very late this msg, I was fix as per your guidence.