Success: [eclipse]: record(whiskey,jameson), > record(whiskey,bushmills), > record(whiskey,glenfiddich), > record(whiskey,dimple). yes. [eclipse]: erase(whiskey,dimple),erase(whiskey,Value). Value = jameson yes. [eclipse]: recorded(whiskey,L). L = bushmills More? (;) L = glenfiddich More? (;) no (more) solution. Fail: erase(whiskey,jameson). Error: erase(Key,anything). (Error 4) erase("whiskey",anything). (Error 5)