When you attempt to send multiple attachments using a DATA step to send
email in SAS 9, the following error message might appear:

   Invalid value for !EM_ATTACH.

The problem occurs when the attachments are specified
as variable names as shown below:

   attach1="'c:\testsas\file1.txt'";
   attach2="'c:\testsas\file2.txt'";
   put '!EM_ATTACH!' "(" attach1 " , " attach2 ")";

To circumvent the problem, remove the comma and the extra quotes
as follows:

   attach1="'c:\testsas\file1.txt'";
   attach2="'c:\testsas\file2.txt'";
   put '!EM_ATTACH!' "(" attach1 attach2 ")";

If you need to specify the comma, you can specify it as needed:

   put '!EM_ATTACH! ("c:\testsas\file1.txt" "c:\testsas\file2.txt")';

You can also specify these using macro variables:

   %let attach1=%str("'c:\testsas\file1.txt'");
   %let attach2=%str("'c:\testsas\file2.txt'");
   put '!EM_ATTACH!' "("&attach1" , "&attach2")";

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