Most EBS instances do not have USER_DATA and USER_IDX tablespaces. You can replace those with APPS_TS_TX_DATA and APPS_TS_TX_IDX if you want, or create any XXMX_DATA/XXMZ_IDX tablespaces and use that instead of USER_DATA and USER_IDX if you want.
I would suggest while creating custom schema in 12.2, please consider the following -
Can you clarify, you wanted to know where to keep the custom objects . Review (Doc ID 1577707.1) and you will find custom table and index tablespaces are defaulted to APPS_TX_TX_DATA and APPS_TS_TX_IDX respectively.
Hope this helps!
you can use APPS_TX_TX_DATA and APPS_TS_TX_IDX.
I have created the Custom Schema as
CREATE USER XXCUSTOM
IDENTIFIED BY 12345
DEFAULT TABLESPACE XXCUSTOM_TBS
TEMPORARY TABLESPACE TEMP1
in this case , what i have to use for main_tspace,index_tspace and default_tspace parameters.
Already youu have created the TS as XXCUSTOM_TBS so use the same for Index and Data