This may happen if while installing a stored procedure in Oracle via SQLPLUS. To see the compilation errors run this:
select * from SYS.USER_ERRORS where type = 'PROCEDURE'
The above will show errors for all procudures with compilation errors. A shorter command that can be executed in SQLPLUS is:
SHOW ERRORS
or
SHOW ERRORS PROCEDURE
See these resources for more:
http://razorsql.com/articles/oracle_compile_errors.html
http://blog.richardknop.com/2011/04/plsql-cryptic-warning-procedure-created-with-compilation-errors/
http://docs.oracle.com/cd/B19306_01/server.102/b14357/ch12041.htm
