If you want to modify the content of a text file you can use the file functions in WinCC OA.
For details please have a look at the WinCC OA Documentation: CONTROL --> Types of functions --> File functions.
Best Regards
Leopold Knipp
Senior Support Specialist
There is a set of functions for manipulating XML data in a more convenient way than parsing it by yourself.
Take a look at the chapter "CONTROL --> Types of functions --> XML Control Extension". At first glance, those functions are not obvious but they are quite handy.