I run this command from prompt: (TeamSite server 6.5)

\iw-home\bin>iwlock \default\main\ACS\WORKAREA\Main\TestContent\test1.html "grab" AXA-AP\ankur.kumar
ERROR:00001: Failure in operation
any ideas????
Same command works for other folders in same workarea:

\iw-home\bin>iwunlock "\default\main\ACS\WORKAREA\Main\Updates\Contact Centre Alert 2.html" "grab" AXA-AP\ankur.kumar
I logged in as administrator role.