Special percentages in PROC TABULATE include COLPCTN, COLPCTSUM, ROWPCTN, ROWPCTSUM, PAGEPCTN, and PAGEPCTSUM. These do not require a denominator definition since the denominator is understood. Adding a denominator definition can result in a Read Access Violation.

The following code replicates the problem:

   proc tabulate data=sashelp.class;
    class sex age;
    table sex age, colpctn<sex age>;
   run;

The code above generates the following messages:

   WARNING: Invalid denominator nesting element: sex.
   WARNING: Invalid denominator nesting element: age.
   ERROR:  Read Access Violation In Task [ TABULATE ]

To correct the problem, remove the denominator definition as shown below.

   proc tabulate data=sashelp.class;
    class sex age;
    table sex age, colpctn;
   run;

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