error: CHARVAL: Character mapping for "b" must have a single value
    at charval.asm(23)
error: CHARVAL: No character mapping for "ab"
    at charval.asm(24)
error: CHARVAL: No character mapping for "abc"
    at charval.asm(25)
error: CHARVAL: No character mapping for "cd"
    at charval.asm(26)
error: CHARVAL: No character mapping for "xyz"
    at charval.asm(27)
warning: CHARVAL: Index starts at 0 [-Wbuiltin-args]
    at charval.asm(28)
warning: CHARVAL: Index 10 is past the end of the character mapping [-Wbuiltin-args]
    at charval.asm(29)
Assembly aborted with 5 errors!