In addition to the VBPMN distribution (see here) you need to install:
Java RE This is needed to transform BPMN files into the
PIF format.
It is not required if you plan to use the PIF format directly. Download Java
RE
Note: VBPMN requires JRE\JDK 1.8 and above.
Apache Tomcat Server 8.0 This is needed for deploying and hosting the VBPMN Web Archive (WAR) More information about tomcat deployment can be found
here Download
Tomcat 8.0