SAP Message 28112 - Table/function argument incorrect &1

Diagnosis
The syntax check found an error in table or function parameters.

System Response
The cursor shows where in your entry the error occurs.

Procedure
A table is denoted by the keyword TABLE, the language-independent tablename and a list of arguments. Each argument consists of , for example:
TABLE TEST_TAB(COLOR='red', PRICE=PRICE_1)
Here, COLOR and PRICE are formal parameters of the table, 'red' is aconstant, and PRICE_1 is a characteristic-specific variable.
A function is denoted by the keyword FUNCTION. The other entries for afunction are the same as for a table, for example:
FUNCTION TEST_FUN(COLOR='red', PRICE=PRICE_1)
One argument is invalid. Arguments must be either constants orvariables which refer to a characteristic. Check the arguments andcorrect the error.