- Detailed numerical results may be sensitive to the exact versions of third party numerical libraries. If you are not using the :ref:`standard Conda environment <system-prereqs>` you may encounter issues when running the :doc:`validation demo </install/demo>`.
- It is not recommended to install using a privileged user, as certain tests might fail during the build process.
- Compiling some packages---in particular
afw---require large amounts of RAM to compile. This is compounded as the system will automatically attempt to parallelize the build, and can cause the build to run extremely slowly or fail altogether. On machines with less than 8 GB of RAM, disable parallelization by settingEUPSPKG_NJOBS=1in your environment before runningeups distrib. - Detailed numerical results may be sensitive to the exact versions of third party numerical libraries. If you are not using the :ref:`standard Conda environment <system-prereqs>` you may encounter issues when running the :doc:`validation demo </install/demo>`.
- Some old installations of Xcode on Macs create a :file:`/Developer` directory which can interfere with installation.
Many versions of the DS9 image viewer software incorrectly read mask planes in Science Pipelines image files as all zeros.