TCC 9,02.149 Windows XP [Version 5,1,2600] It seems temporarily changing the LocalHistory directive does not have the expected effect. C:\User>option localhistory localhistory=No C:\User>option //LocalHistory=Yes C:\User>option localhistory localhistory=Yes After this I executed some commands in this and other tabs, I expected the history in this tab to remain unchanged when I executed commands in other tabs and that commands executed in this tab would not be included in the history of other tabs. None of those assumptions held. Is not this what changing the directive should do? I use global lists for all shells together with SHRALIAS. Also, if I start a new tab with the /LH switch the history stays local as expected.