If an error occurs or the program cannot find the filter the status flag is set to 1, otherwise it is 0.
The program looks by first determining the filter wheel position number using tx filter or rstage then looking up the names in the Filter table of the database.
Note: some of the current filter names contain characters such as # and [ ] which can have undesirable side effects under the UNIX operating system (you will get a "No match." error). You will have to be careful and quote them properly.