Hi, I think I've discovered an problem in the following class>>method but still considering myself somewhat of a newbie, I'm not entirely sure: GRPharoPlatform>>isIpAddress: aString | ip | ip := aString findTokens: '.'. ^ ip size = 4 and: [ ip allSatisfy: [ :each | each greaseInteger notNil and: [ each greaseInteger notNil between: 0 and: 255] ] ] The problem is the last line "each greaseInteger notNil between: 0 and: 255"... where the notNil message returns a true or false, and it does not respond to "between:and:". I believe the fix ought to be to remove the "notNil" in the last line to result in the line: "each greaseInteger between: 0 and: 255" since the "notNil" is already considered before the "and:". This is from the most recent One-click download: Pharo1.3 Latest update: #13307 ------------------------------------------------------ Marco A. Gonzalez