C4 2026 SP3

Release date: Jul 01, 2026

Build number: 2026.3.0.165

See full release notes

Release Info

⚠️ Important notice
To ensure the correct installation of all installation packages, we strongly recommend performing a complete installation of the C4 System. We also recommend to download the latest version of all connected Drivers and Developer Console.
Key features
• Fully scallable and extensible in all application parts.
• Opened for 3rd party developement with unique Simple Client SDK.
• Optimized for large data and network trafic.

Requirements

C4 Server Small installation

up to 100 devices (IP end points), up to 5 users/operators

Hardware specifications	CPU: 10 cores Storage: 128 GB SSD Memory: 32 GB RAM
Operating system	Microsoft Windows 10 or Windows Server 2019 and later Starter and Home editions are not supported
Database	Microsoft SQL Server 2019 or later
Prerequisites	Microsoft .NET Core Hosting Bundle 6.0.13 installed Microsoft .NET Framework 4.8 runtime installed

C4 Server Large installation

more than 100 devices (approx. 500 devices per dedicated communication server)

Hardware specifications	CPU: 16 cores Storage: 256 GB SSD Memory: 64 GB RAM
Operating system	Microsoft Windows Server 2019 and later
Database	Microsoft SQL Server 2019 or later Standard or Enterprise edition recommended
Prerequisites	Microsoft .NET Core Hosting Bundle 6.0.13 installed Microsoft .NET Framework 4.8 runtime installed

Client

Hardware specifications	CPU: 4 cores Storage: 128 GB SSD Memory: 8 GB RAM
Operating system	Windows 10, Windows 11 Starter and Home editions are not supported
Prerequisites	Microsoft WebView 2 component installed

Client for visualization

Hardware specifications	CPU: 4 cores Storage: 128 GB SSD Memory: 8 GB RAM GPU: Integrated or dedicated GPU with DirectX 11 support or newer
Operating system	Windows 10, Windows 11 Starter and Home editions are not supported
Prerequisites	Microsoft WebView 2 component installed

Release Info

Fixed an issue where commands for some devices were not displayed when configuring Workflow actions.

Requirements

Release Info

Fixed an issue where icons for some Monitoring elements were not displayed in installations migrated from a previous generation.

Requirements