Hello, FileData Column(col_name) is the system variable which is used in a loop to read each record from a CSV/Text file and it returns the single node of the file (Return type is String). For eg. You can use it this way:
1 Start Loop "Each row in a CSV/Text file of Session: Default"
2 Variable Operation: $Filedata Column(1)$ To $v_NameSearch$
3 Message Box: "Search name: $v_NameSearch$"
4 End Loop