nvda.log

Steps to reproduce:

with MathCAT installed, open the attached PDF in acrobat and read-all

Actual behavior:

speak command keys on
NVDA+down arrow
Illegal MathML found: see NVDA error log for details
a is less than b

The issue here is that the marked content is not being quoted for XML special characters so the < is tagged with a PDF mo structure element but being linearised as <mo><</mo> rather than <mo>&lt;</mo> so MathCat is handed non well formed xml that can not be parsed.

Expected behavior:

It should read the math as a is less than b

NVDA logs, crash dumps and other attachments:

System configuration

NVDA installed

NVDA version:

nvda 2025.1.2

Windows version:

11

Name and version of other software in use when reproducing the issue:

MathCAT 0.6.10

less.pdf

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Have you tried any other versions of NVDA? If so, please report their behaviors.

If NVDA add-ons are disabled, is your problem still occurring?

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?