One of the following error messages is generated when you pass a null value to the %KLEFT or %KCMPRES macro function:

ERROR: Macro function %KLEFT has too few arguments.

or

ERROR: Macro function %KCMPRES has too few arguments.

The example code below generates the error:

%let a=;
%let b=%kcmpres(&a);

To circumvent the problem, replace the null value with a blank. For example:

%let a=%str( );
%let b=%kcmpres(&a);

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