How do I set iscobol.file.index.FileName with variable file name assignments?

Question:

The ASSIGN TO name in my SELECT statement is a variable.
How can I set iscobol.file.index.FileName in the properties file when the file name is determined by the program at run time?

Answer:

The solution is to set the iscobol.file.index.FileName property programmatically. For example,

   ...
   77 file-name pic x(100).
   77 property-name pic x(100).
   ...
   
   string "file.index.", 
          file-name delimited by spaces 
          into property-name.
   set environment property-name to "easydb".

Notice that when you set an isCOBOL property using the SET verb, you do not specify the "iscobol." prefix in the variable name.