In our 12.2 environment we are trying to create MATERIALIZED view and we are getting, "ORA 38818: Illegal reference to editioned object APPS.abc".
We have already registered our custom schema by Doc ID 1929668.1.
Please refer below reference document, it may help.
ORA-38818: Illegal Reference To Editioned Object When Creating Materialized View (Doc ID 1556379.1)
Section 22.214.171.124 in the following Document:
Developing and Deploying Customizations in Oracle E-Business Suite Release 12.2 (Doc ID 1577661.1)