01	start operand is missing or illegal
02	start directive is missing
03	first char of label isn't alpha
04	label isn't alphanumeric
05	label too long
06	symbol table has too many symbols
07	duplicate symbol
08	hex length not an even number
09	hex length is too long
10	char length is too long
11	invalid or missing instruction
12	program is too long
13	end directive missing
14	illegal operand
15	missing operand
16	end operand is missing or illegal
17	operand not defined