Check and select Windows 7 or Windows XP (Service Pack 3) .
Dedicated graphics card (NVIDIA Quadro or RTX series with 4 GB+ VRAM is ideal). Disk Space: At least 10 GB of free space for installation. Step-by-Step Installation Guide Catia v5r21 hardware requirements Install Catia V5 R21 On Windows 11
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Catia V5 R21 is a legacy version of Dassault Systèmes' CAD software. While Windows 11 is not officially supported for this version, you can achieve stability by using the correct environment settings and administrative privileges. Prerequisites Required for registry changes. DSLS / LUM: Ensure your license manager is active. Compatibility Mode: Set to Windows 7. Check and select Windows 7 or Windows XP (Service Pack 3)
Find the on your desktop or in the installation directory ( .../win_b64/code/bin/CNEXT.exe ). Right-click the shortcut → Properties → Compatibility . DSLS / LUM: Ensure your license manager is active