How to use an argument from the command line to open a file?

Specman code to open a file passed to the e program from the command line, and allowing for the possible use of a default file name,
How to create and use Mnemonic Maps

Mnemonic Maps : It is the way to give “names” to specific values of a bus.
How to overwrite the severity of a message and turn off specific check?

If you give a specific name to your error message, you can turn it off later on. This may be useful in a case where you want to see simulation behavior with only this checker turned off or if you want to run a test that ignores a certain error.
Handling env specific coverage with per_unit_instance option in specman e

An eVC, that is used in multiple environments, has a functional coverage implementation.