Outlook 2003: command line argument not valid Share on Facebook Post on reddit Tweet on Twitter Share on LinkedIn Home › Forums › Office › Office XP / 2003 General Issues › Outlook 2003: command line argument not valid This topic contains 1 reply, has 2 voices, and was last updated by Wired 11 years, 4 months ago. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts shawnMember August 1, 2008 at 6:01 am #134100 Now a days a common a error is coming in outlook 2003 i.e. The command line argument is not valid. Verify the switch you are using Even though it was working fine earlier…..am not installing any thing dint update………can any body tell what is this? thanks WiredModerator August 1, 2008 at 8:42 am #272542 Re: Outlook 2003: command line argument not valid Check the Outlook shortcut. Does it have additional parameters in the target line? Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic.