When you double-click on a data set in the SAS Explorer or in the
Microsoft Windows Explorer, the following error message might appear:

   ERROR: Could not open the specified registry key.

This error appears three times before SAS opens up with the data set in
the VIEWTABLE window.

The following warning might also appear with the above listed error
message:

   Warning: Attempt to free a semaphores that is not locked.

There are a few possible workarounds:

* Call Tech Support to get a new regstry.sas7bitm file.

* Run the 91Regbld.exe program as referenced in SAS Note  #012774 .

* Uninstall SAS, if SAS 9.1 is the *only* version of SAS on your
machine, perform the following:

   1. Reboot your machine.
   2. Log in as the administrator.
   3. Close all applications, including anti-virus software, and stop
      any SAS services or processes that are running.
   4. From Start>Settings>Control Panel>Add/Remove Programs, remove
      (uninstall) SAS 9.1.
   5. Go to C:\Program Files\SAS directory and delete this directory.
      ****Only do this if this is the only release of SAS on your
      machine****
   6. Reboot your machine again.
   7. Log in as the administrator.
   8. Close all applications, including anti-virus software and stop
      any SAS Services or processes that are running.
   9. Reinstall SAS 9.1.

If you have *multiple* versions of SAS on your machine, perform the
following:

   1. Reboot your machine.
   2. Log in as the administrator.
   3. Close all applications, including anti-virus software, and stop
      any SAS services or processes that are running.
   4. From Start>Settings>Control Panel>Add/Remove Programs, remove
      (uninstall) SAS 9.1.
   5. Reboot your machine again.
   6. Log in as the administrator.
   7. Close all applications, including anti-virus software, and stop
      any SAS services or processes that are running.
   8. Reinstall SAS 9.1.

Operating System and Release Information