Parameter number value needs to be converted to text within Select Expert:
(if {?Read_Route} = '*' then {CSS_UTIL_ENVRNMT.READ_ROUTE} = {CSS_UTIL_ENVRNMT.READ_ROUTE}
else {CSS_UTIL_ENVRNMT.READ_ROUTE} = {?Read_Route})
Above returns error message that “A string is required here”
(if {?Read_Route} = '*' then {CSS_UTIL_ENVRNMT.READ_ROUTE} = {CSS_UTIL_ENVRNMT.READ_ROUTE}
else {CSS_UTIL_ENVRNMT.READ_ROUTE} = {?Read_Route})
Above returns error message that “A string is required here”