The program variable must be enclosed in single quotation marks if it contains special characters. Up to 132 characters can be specified for a program variable name. This includes any subscripts, embedded blanks, parentheses, and commas. It does not include the enclosing single quotation marks when special characters are used.
Program Variable
.-------------------.
V |
>>-qualified-name---subscript------,subscript-------+----------><
Some examples follow:
COUNTA
'VAR1(2,3)'
'A.VAR1(I,3,A.J,1)'
'VAR1 OF A(I,3,J OF A)'
'&LIBNAME'