Once the files are copied, you may encounter an error regarding the "Environment File." If the installer hangs at the end, open Task Manager
: Right-click setup.exe and select Properties . Under the Compatibility tab, check "Run this program in compatibility mode for" and select Windows 7 . Also, check Run this program as an administrator . install+catia+v5+r21+on+windows+11+updated
Navigate to C:\ProgramData\DassaultSystemes\CATEnv (hidden folder – enable “View hidden items”). Edit CATIA.V5R21.B21.txt with Notepad as Admin. Add these lines at the bottom: Once the files are copied, you may encounter
Right-click on the main executable (usually CNEXT.exe or the shortcut) and select . Head to the Compatibility tab. Once the files are copied