Converting to PDFs loses pairs of brackets

[longnh]

Hello everyone, I'm using PDF-Xchange 10.8.5 PDF-Tools to convert DOCX to PDF, but I've encountered an issue that is described as below:

• A pair of brackets in MathType formula (shortcut: Ctrl+() will disappear after converting to PDF

• The bracket that is typed by keyboard key is retained

• I've checked that all the necessary fonts are installed

• This issue doesn't appear with PDF-XChange Office2PDF

• This issue doesn't appear with Adobe Acrobat

Please tell me how to fix this. Thank you so much!

[Daniel - PDF-XChange]

Hello, longnh

Could I possibly request a copy of the problematic Word document, and the resultant output, from both our software and acrobat (for comparison).

Kind regards,

[longnh]

Hello, longnh

Could I possibly request a copy of the problematic Word document, and the resultant output, from both our software and acrobat (for comparison).

Kind regards,

Thank you for your reply. Here I attached the ZIP file that includes:

• DOCX file

• PDF file created by Acrobat

• PDF file created by PDF-Xchange PDF Tools (the one with error)

• PDF file created by PDF-XChange Office2PDF

Samples.zip

[Daniel - PDF-XChange]

Hello, longnh

What version of MS Office are you using currently? I encountered the following error upon opening the Word document on this end and investigating the equations:

image.png

The reason for this was that my test conversion with PDF-Tools did include the brackets, however, it also retained the damaged text formatting/positions from the original word file:

image(1).png

After allowing word to fix the equations into the modern format, the result was much better and all items remained included with PDF-Tools:

image(2).png

The text positions may be a case of font mismatch, perhaps the original font you have used in the word document are not available on my end, but the underlying formatting error could have an impact as well, if it is unsupported as MS Word itself now claims.

Kind regards,

[longnh]

Hello Daniel,

Thank you for your help!

1. I'm using MS Office LTSC 2024 (V.2408 build 17932.20252), and I created those equations using the add-in MathType (latest version 7.11) from the Inline Equation command in MS Word.

2. In my end, I don't see any problem with that DOCX file. I've tried to reopen it again, but there's no warning as you mentioned. I double-clicked the equation, and it opened the MathType window without any errors. The Palatino Linostyle font should be present on any system, correct?

2026-06-01_23-06-54.png

3. I don't know what Equation Editor 3.0 means. I googled it, and it seems like EE3 is a very old version of MathType from a long time ago, but that makes no sense, because I've just typed those equations by myself a few days ago, using the latest version of MathType.

2026-06-01_23-06-25.png

4. I suspected that maybe the font that caused the problem, so I re-formatted all equations (using MathType add-in) to turn all fonts to Times New Roman, which every system has by default. And then I converted that DOCX file to PDF, and I don't see the problem anymore: those brackets remain.

2026-06-01_23-31-00.png

5. Now I changed the MathType style as below, and the error appeared again:

2026-06-01_23-32-23.png

2026-06-01_23-32-43.png

6. In the meantime, converting by Acrobat and Office to PDF (PDF-Xchange) is free of error, but using PDF Tools isn't (result files in ZIP)

Sample_2.zip

[Daniel - PDF-XChange]

Hello, longnh

Thank you for the extended breakdown. I still cannot reproduce the issue on this end, but I have escalated the report to the Dev team, and passed along your samples. I will keep you posted if they have any more information for us.

Kind regards,