-------------------------- whatever value is set to allowUnderscoreAssignment preference, underscore is always allowed. the fix seems simple. it consists in changing the Scanner typeTable initialization. by replacing the line newTable at: $_ asciiValue put: #leftArrow. by newTable at: $_ asciiValue put: #xUnderscore. in Scanner class>>initialize -> SLICE-allowUnderscoreAssignmentFix-AlainPlantec.1 in inbox --------------------------- Alain