Hadoop, Gradle, HIPI: Can not create a Path from an empty string

[Swapna Patil]

Using Hadoop-2.8.4, HIPI, Gradle.

I am trying to run the sample program of Computing The Average Pixel Color given on HIPI website: http://hipi.cs.virginia.edu/gettingstarted.html

However, I am getting the following error when I am trying to execute the jar:

Error: Exception in thread "main" java.lang.IllegalArgumentException: Can not create a Path from an empty string

Appreciate any help. Thanks in advance. :)