Off the top of my head, they need to be concatenated. I’ll check. If you want different constraints for different inputs…that may work under the ResourceManager, but that wasn’t released for 3.4 and I don’t think that functionality is there for 3.5.
The option is a StringVector (it should be a FileVector…). For most use cases, if you offer multiple arguments, it actually RANDOMIZES which one it chooses; it certainly does not read them all concatenated by default.
You may be required to use the format
-cst_file file1 file2
to read in multiple – which is an aside because I think you do not want to.