The runtime tunable “core_file_name” when specified will change the name of the file that is created when setting the tunable “core_on_error”. 

The cobconfig file contains the runtime tunables:

set core_on error=2

set core_filename =core.%p@%t_%d

The core file that is generated by “core_on_error” is changed the definition of core_filename.  In this example  the file name should be:

core.12345@165920_20080115

If the core filename is not being changed check the setting of “core_on_error”. The only valid option is the value 3. Value 3 produces a snapsnot core file when a runtime error is encountered. After creating the core file, the process continues as normal. For example, the runtime system will display the error message.