Only peak steady state response and phase angle output. Should be able to handle different number and sizes on each face. Should incorporate supports with partial fixity. Pathname support to prevent mingling of data and executables. Prefer notification on website.
Software is never totally but free.
Testing New version features do not work or are flawed. Releases are more like beta-test versions to be followed by frequent patches. Extensively test against a benchmark set of examples. Most users depend on REI for testing. Use test, production test releases prior to production release.