1 and 3 are correct.
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IvanhrThe program returned a code 13 error and the text/(error message) "File not found"?»But how about expressions like «The train was rolling at a speed of 57 mph»?
a code of 13 doesn't work because there's only one code 13.
Gleb_Chebrikoff'Code 13' is a combination featuring a postposed numeral in strict restrictive opposition.Meaning "13" is an identifier and nothing else, while "128 mph" is more like a property of speed? Hmmm.