Module Downloads & Release Notes
MES 4.0 is Available Now
Ignition 8.3 and MES 4.0 launched side by side on September 16, 2025, with exclusive compatibility. Explore what’s coming in the MES 4.0 Overview and get ready with the MES 4.0 Upgrade Guide.
Understanding Sepasoft Module Versions
Built on Ignition
Sepasoft modules are built on Inductive Automation’s Ignition® Platform, and module versions always correspond to the Ignition version installed. Ignition module downloads are available on the Inductive Automation Downloads page.
MES Platform • Ignition Version • Minor RevisionExample: 3.81.1 | |
| Sepasoft Module MES Platform | 3 |
| Ignition Version | 81 (Ignition 8.1) |
| Sepasoft Service Pack Release | 1 |
Release Types
Stable Release and Service Pack (SPx): Production-ready installation with monthly bug fixes.
Release Candidate (RCx): Passed Sepasoft QA and ready for customer development/QA environments.
RC numbers increment as fixes are made (e.g., 3.81.22 RC1, RC2, RC3).
Once stable, the release moves to a monthly service pack (e.g., 3.81.22 SP1, SP2, SP3).
WARNING: If you are upgrading to MES 4.0 from any previous version, you must read the upgrade guide first before installing MES 4.0. Visit the following URL for more information before installing: MES 4.0 Upgrade Guide
Installation & Upgrades
Installation Best Practices
- All Sepasoft MES modules must have the same version for installation.
- Business Connector and Web Services Modules must have the same version for installation.
- MES Utility Modules must have the same version for installation.
- Install the Ignition version listed in the ‘Highest Tested Ignition Version’ stated in the downloads tabs below.
Upgrade Resources:
- Sepasoft MES 4.0 Upgrade Guide
- Ignition 8.1 to 8.3 Upgrade Guide
- Ignition 7.9 to 8.1 Upgrade Guide
- Ignition 8.0 to 8.1 Upgrade Guide
- Platform 1 and 2: Email support@sepasoft.com
Know which archived versions you are looking for? Service Pack (SP) Archive and Release Candidate (RC) Archive
↓ MES Platform 3.0 Stable Release
↓ Sepasoft Business Connector and Web Services
↓ MES Utility Modules
↓ MES Platform 3.0 Release Candidate
↓ MES Platform 4.0 Release Candidate
2.81 and X.79 are no longer supported in the monthly maintenance cycle.
Use the download links below only when re-installing 2.81 and X.79 versions.
Inductive Automation has announced the end of LTS for Ignition version 7.9 as of June 30, 2022. FAQ for End of LTS. Sepasoft must follow this with the end LTS for our 2.79 and 3.79 versions of the MES system.
Please upgrade your MES project to Ignition 8.1 to use our maintenance releases.
As long as you have a support contract, Support will continue to answer questions, provide advice, and work to point you in the right direction with issues you may encounter through June 30, 2024.