9 May 2025 8:57:44.962 PM cvt_basis(): Fortran90 version Arrange a set abstract data vectors into clusters. This version of the code handles up to 10 families of data. It is time to read sets of solution files. We assume that a series of solution files exists, with "consecutive" names, like fred001.txt, fred002,txt, ... Just specify the FIRST name in the series, and the program will read them all. The program can read another series of data if you specify yet another first name, or you can type "none" when there are no more file series. What is the first solution file (in the first series)? What is the first solution file (in the NEXT series) or "NONE"? cvt_basis(): Fatal error! There do not seem to be any solution files.