system error vs program line

system error and program line both are nouns.

Word	Noun	Adjective	Verb	Adverb
system error	Yes	No	No	No
program line	Yes	No	No	No

As nouns, program line is a hypernym of system error; that is, program line is a word with a broader meaning than system error:

system error: an instruction that is either not recognized by an operating system or is in violation of the procedural rules
program line: (computer science) a line of code written as part of a computer program

Other hypernyms of system error include command, instruction, statement.

system error (noun)	program line (noun)
an instruction that is either not recognized by an operating system or is in violation of the procedural rules	(computer science) a line of code written as part of a computer program