EBS 12.2.6 - Schema Migration and utl_file functions

We have loaded the EBS Schema Migration along with RUP16 for HRMS and now our custom packages that import timecard files from other systems are throwing errors opening the import files. We are using utl_file.fopen('<all_directories.directory_name for the folder>', <filename>, 'R') and it's returning error:

Invalid Operation Error : ORA-29283: invalid file operation

ORA-06512: at "SYS.UTL_FILE", line 536

ORA-29283: invalid file operation

I've checked the permissions and owner of the folders involved and the file itself and they all should allow access. Does anyone know if the EBS Schema migration changed the access of utl_file functions and all_directory entries?