PROBLEM WITH EVENT TRIGGER IN BIPUB 12C

HI,

i have some data model with EVENT TRIGGER both refer to the same package

some are ok

other are not

EVENT TRIGGER are after data.

when i execute date model in 11g all works fine

and in 12 c i have message :

"failed to load XML "

and when i excute the report

oracle.xdo.servlet.data.DataException: oracle.xdo.servlet.data.DataException: oracle.xdo.XDOException: Invalid PLSQL function call. 
Only global level PLSQL function calls are allowed. Please check PLSQL function definition

i tried a lot of test put i have always this message

i built a package with nothin inside only return TRUE , and i have the message.