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When I try to open a message, I get instead an error message from the Forms Registry, claiming that it couldn find the object. What happened?

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When I try to open a message, I get instead an error message from the Forms Registry, claiming that it couldn find the object. What happened?

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You have a missing or damaged \Windows\Forms\frmcache.dat file. Microsoft Exchange uses this file to determine how to open a message. You will see it any time that you attempt to instantiate a window rendering a single message, such as happens during the course of a File.Open or Compose.Reply to sender command. You need to restore this file. Unfortunately, the obvious solution – reinstalling Exchange – will not do this. Before doing anything, stop Exchange completely. (Would you change your fan belts while leaving the engine running?) One component of Exchange, the message spooler process, will continue to run for a while after you close Exchange; to stop this component immediately, press Ctrl-Alt-Del to view the task list, select the row corresponding to the spooler (“Mapisp32”), and issue the End Task command. First, look in your \Windows\Forms folder. You should find there a file named frmcache.dat. Rename it to something innocuous, such as frmcache.bad. If you find there a file nam

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