- X-Midas versions:
  - Please see the NeXtMidas User's Guide for a complete list of supported X-Midas versions.
- Fortran compilers:
  - Any of the Fortran compilers compatible with X-Midas will work.
- Setup for NeXtOpt:
  1. Set the `NMROOT` and `JAVAHOME` environment variables (same as done for a normal NeXtMidas installation).
  2. Start X-Midas.
  3. Define the NXM option tree:

         X-Midas> xmopt nxm $NMROOT/nxm/sys

  4. Add NXM to the path

         X-Midas> xmp +nxm

  5. Use `XMBOPT` to build the UCL option tree.

         X-Midas> xmbopt ucl

  6. Now, use `XMBOPT` to build the NXM option tree.

         X-Midas> xmbopt nxm