So you want to read a CSV file, modify some content and then save it as another CSV file? It can be done with the csvRead/csvWrite commands, but it is rather cumbersome. It is much easier with the new csv array commands:
csvReadArray reads all CSV data at once and stores it in an array.
csvReadArray example: See the DemoCsvSaveArray demo macro that is installed with UI.Vision RPA. It uses csvReadArray, too.