This special process is used to replace the comma delimiter with a delimiter of your choice. Any valid ASCII character can be specified (1-254). For example if we swapped the comma with the pound symbol "#" (ASCII 35) the file before applying this process looks like:
Data1,Data2,Data3,Data4
Data1,Data2,Data3,Data4
After applying this process it looks like:
Data1#Data2#Data3#Data4
Data1#Data2#Data3#Data4
If this doesn't fit your needs please also take a look at: Special Processing: Search and Replace a String
See also:
Command Line Example (Changing Delimiter from comma to "#")
Special Processing: Search and Replace a String