FM Module - Type Pool xxx has not been declared

Dear Colleagues,

I am a SAP BI consultant with poor ABAP knowledge ....I have worked on a company where customer exit variable development were manage with Function Module.

I am trying to implement the same solution in my current company.

So to create the function module I have to declare a list of parameters in import and export tabs.

My issue is the following :

The following associated type has not been declared.

Import

RRO01_S_RKB1F-PERIV - error message Type pool RRO01 has not been declared

RRS0_T_VAR_RANGE - error message Type pool RRS0 has not been declared

Export

RSR_T_RANGESID - error message Type pool RSR has not been declared

What should I do to solved this issue ?

Thanks,