Fix errors that relate to reading or creating files in the temp or tmp environment on an MS Windows PC

This tip will help resolve the error messages *e97* and
*e48[0-9]* which relate to the creation of and or reading of
temporary files on machines running MS Windows.

 *e97* Can't create diffs blah blah
 *e485* Can't read file blah blah

I've experienced these errors when trying to use the diff
commands or, any shell commands being called via the :! or
:r!  commands.  

  i.e., 

  :r! sort blah blah blah % 

  or 
  :r! dir

  etc.

To correct this problem you need to change your environment
variable for $TMP, or $TEMP.  You can do this in a couple of
different ways.


 1. Via the Windows environment settings ...

     - There's more than one way to do this and here's one
       of 'em

        - Right click "My Computer"
        - Choose "Properties"
        - Click the "Advanced" tab
        - Click the "Environment Variables" button
        - In the bottom window pane, scroll down to the TMP or
          TEMP variables and highlight them.
        - Then click the "Edit" button and change it path to
          whatever directory you have read and write
          priviledges to.

 2. A much better way!
     - Add the following to your _vimrc file
       
       let $TMP="c:/tmp"
       
        - Create the path first

I hope this helps resolve the issue for you.
 - corp-mule