I want to call a datafile that exists on my PC in AWRDE.
In AWRDE, you can reference external data files by using the function data_file. Below is an example of a VSS system diagram where it is referencing an external datafile named IQ_CDMA.txt to feed the source. The data file in this example contains two columns, the "I" and the "Q" values.
If the datafile exists in the same location as where your project is, you do not need to put the full path of the datafile in the data_file function.