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When a value from a Boolean expression is assigned to a variable and
the next statement contains an arithmetic expression that results in a
missing value, the result of the Boolean expression is incorrectly set
to missing.  The arithmetic expression must have more than one
arithmetic operator (i.e. +,-,* or /).

The following example does not correctly assign the result of the
Boolean expression to the variable D.  D is incorrectly assigned a
missing value:

  data _null_;
    input a b c;
    d=(a eq 0);
    e=(a*1)+c;
    put d= e=;
  datalines;
  0 0 .
  ;

The following output is written to the SAS Log:

  d=. e=.

This problem occurs only in Release 8.2 TSLEVEL 2M0.

To circumvent this problem specify the following on an OPTIONS
statement, in a CONFIG file, or at SAS session initialization:

  dsoptions=nomissopt;


A Technical Support hot fix for Release 8.2 TSLEVEL TS2M0 for this
issue is available at:

http://www.sas.com/techsup/download/hotfix/82_sbcs_prod_list.html#005758

Operating System and Release Information

A fix for Release 8.2 (TS2M0) for this issue is available at: