- I tried to compile and I get an error about missing `modules/conex` and/or `modules/data`
**Q:** I tried to compile corsika and I get an error about missing `modules/conex` and/or `modules/data`<br>
- The code is meant to be checked out using the `git clone` command (see [README instructions](https://gitlab.iap.kit.edu/AirShowerPhysics/corsika/-/blob/master/README.md#compiling)). If you downloaded a zip or tar file, you will need to instead use the `git clone` command instead with the `--recursive` flag.
**A:** The code is meant to be checked out using the `git clone` command (see [README instructions](https://gitlab.iap.kit.edu/AirShowerPhysics/corsika/-/blob/master/README.md#compiling)). If you downloaded a zip or tar file, you will need to instead use the `git clone` command instead with the `--recursive` flag.
