// read in BEL document and compile to proto network
final File doc = new File(DOC_PATH);
assertThat("test BEL document cannot be read", doc.canRead(), is(true));
Stage1Output p1s1 = p1.stage1BELValidation(doc);
final ProtoNetworkBuilder bldr = new ProtoNetworkBuilder(p1s1.getDocument());
pn = bldr.buildProtoNetwork();
// Create system configuration, BELFRAMEWORK_HOME must be set.
try {
createSystemConfiguration();
} catch (IOException e) {