The entry `mp2` leads to a submenu which allows to set some
keywords for MP2 and RI-MP2 calculations, e.g. defining frozen
orbitals, maximum memory usage, or assign auxiliary basis sets for
RI-MP2 calculations, etc. If you want to use `ricc2`, you have to use
the entry `cc2` and the submenu `ricc2` in order to
assign MP2 as wavefunction model.
It covers all keywords required for `rimp2`
calculations, Mandatory for `rimp2` runs is the specification of the
auxiliary basis set using the menu entry `cbas`

. (Alternatively,
the `rimp2prep`

tool can be used to set the keywords needed for
`rimp2` calculations.)

Conventional MP2 calculations with `mpgrad` require a number of
additional settings for which it is recommended to invoke the
interactive tool `mp2prep`

. For geometry optimizations with
`jobex` use `nohup jobex -level mp2 -ri ...`

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