The 59 new oninit return codes introduced in Informix® 11.70 describe exactly why the server didn't start. We also document what your next move should be.
For example, oninit return code 175 says: The database server failed to initialize
the root dbspace. What you should do if you get this return code is to check the root dbspace related parameters in
server configuration file (onconfig) to make
sure that the path for the root dbspace is valid.
The oninit return codes are documented in the Administrator's Reference.