Import data object not working

I need to import a csv file as an attachment from a file directory in a pdf document.

This is the file directory location:

C:\Temp\trm\output.csv

Here is the script:

this.importDataObject("Unknown","c/Temp/trm/output.csv");

When the script is run from the console, the console reports back as false.

I think the problem may be with defining the cName?

Any assistance most appreciated thank you.