This exception is thrown by index creation and basically it depends on database db_block_size parameter.
What you can do is setup the reporting repository from DM 3.3. After that run manually /datamodeler/reports/DMRS_Upgrade_Script_DM3.3_DM4.0.sql against the database. One (probably DESIGNS__IDX) of the index creation statements will fail. We'll fix the message in the log file with the exact index name.
Thanks for reporting the issue
The upgrade scripts fail as you said:
Error starting at line : 11 in command -
CREATE INDEX DESIGNS__IDX ON DMRS_DESIGNS (DESIGN_ID, DESIGN_OVID, DESIGN_NAME, VERSION_COMMENTS, DATE_PUBLISHED) NOLOGGING
Error at Command Line : 11 Column : 30
Error report -
SQL Error: ORA-01450: maximum key length (3118) exceeded
01450. 00000 - "maximum key length (%s) exceeded"