Software Updates

The latest version of PTC MKS Toolkit is: 10.4.
The latest version of MKS Lex & Yacc is: 3.4 patch 2.
The latest version of PTC X Server is: 10.4.

For current patch levels for the PTC MKS Interoperability Products, see the patches section of our website.

To get your update, please fill out and submit the following form. All fields are required unless otherwise noted. Once we receive your completed form and validate your eligibility to update, we will contact you with a private URL that can be used to download the new release.

All information provided will be kept confidential (see our privacy statement for details).

If you have any questions about this form, please contact PTC Technical Support at or Sales at or by calling +1-703-803-3343.

Required Customer Information:
*First name:
*Last name:
(if applicable)
*Zip/Postal Code:
Fax (optional):
Current Version:
Product Serial Numbers:
Please put each serial number on a separate line.