Informix Error -4402
-4402 In this type of statement, subscripting may be applied only
to array variables to select individual array elements.The statement contains a name followed by square brackets, but the name is not that of an array variable. Check the punctuation of the statement and the spelling of all names. Names that are subscripted must be arrays. If you intended to use a character substring in this statement, you will have to revise the program.