ST Parser Error (STP0027): Constant or range expected.
The ST parser detected a syntactical fault in a CASE statement:  a value or a value range is missing in a line of the case list. 
Before the : operator, either a single constant or a value range must be specified. 
Error example: In the first line, this constant or range is missing.
| Further Info For information on the correct ST syntax refer to the topic "ST code objects". | 
