0AIB_CHECK_MAIN is a standard SAP function module that performs functionality. This is available within standard R/3 SAP systems depending on version and release level.
Below are the pattern details for this FM showing its interface including any import, export and tables parameters. There is also a list of Exceptions and for your convenience any standard documentation available. All this information and more can also be viewed if you enter the function module name 0AIB_CHECK_MAIN into the relevant SAP transaction such as SE37 or SE80.
CALL FUNCTION '0AIB_CHECK_MAIN' " EXPORTING i_gnjhr = " biwtai1-gjahr i_prnam = " biwtai1-prnam i_prnams = " biwtai1-prnams i_main = " biwtai1-main EXCEPTIONS INPUT_ERROR = 1 " . " 0AIB_CHECK_MAIN