I have downloaded HAMMER 1.0.2 and am trying to run the sample data. I used the values in the user manual to set up the project. However, when I run the "Perform Normalization Step", I get an error "Abnormal termination: 1". What does this mean?

I am on Linux, and have Java 1.6.0_01 and FSL 4.1.4. I get the same result whether I select "Use FSL for Linear Transformation" or not.