I have a 16 digit serial data stream which I am parsing to obtain the annuncator/units "81 = kg cm, 82 = Lb inch and 83 = N cm" using the string subset. This string is then passed to the case structure. When the serial string is read the default case is always used. The string that is being read is 41810000000001 with a start word before and an end word behind the string. I have attached my vi. When I use the prob to debug the value is " ". Is the string being parsed correctly? I must be missing something. Thank you.