The runtime is not installed, or the version number in your web.config or app.config does not match the installed runtime version.
This guide covers how to find, choose, and install the correct credist packages for your environment. crredist
Understanding CRRedist: The Vital Crystal Reports Runtime Component The runtime is not installed, or the version
| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Missing VCRUNTIME140.dll | VS 2015–2022 redist not installed | Install the latest VC++ redistributable | | side-by-side configuration is incorrect | Corrupt or missing CRT assembly (pre-2015) | Reinstall the correct version | | Multiple apps crash after one install | Architecture mismatch (x86 app, x64 redist only) | Install both x86 and x64 versions | | 0x80070666 error during install | Another version already installed (e.g., older vs newer) | Uninstall conflicting version or use /repair | The runtime is not installed
: Sometimes the error isn't the installation but insufficient registry key permissions for the user account running the app.