dgate batch delete

Hi,

I want to get rid of 1426 studies from Conquest server 1.4.13 (both data and database records) for which I have the study UIDs.

I did run the following for one study, and no output came up; but the study still returns query response.
dgate -v --deletestudy:1.2.840.113704.1.1761978484.1084.998316775.67
And the data files are still there.

What is wrong with the above command?
Should I restart database (would be a pain)?

If I can successfully delete a study, then I can do a batch delete. Please advise. Thanks.

Thanks. Command worked after I changed directory to C:\dicomserver (or /cygdrive/c/dicomserver if cygwin) folder first.
PATH was set right. Anyways, I am happy I can batch away.