about the icegridregistry and icegridnode

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i write a icegrid server
and it run good
but i have a problem
when i shut the icegridnode and icegridregistry
and
start icegridregistry again
the icegridregistry and icegridnode can't start
i must clear the db\registry files
and it run good
but i have a problem
when i shut the icegridnode and icegridregistry
and
start icegridregistry again
the icegridregistry and icegridnode can't start
i must clear the db\registry files
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