The two versions of JasperAssistant have different prerequisites. Depending on the target version of Eclipse IDE, follow the list of prerequisites for that specific version.
Eclipse 2.1.2/2.1.3, WSAD 5.1.1/5.1.2
Version 1.3 or 1.4 of Java Runtime Environment (JRE) or Java Development Kit (JDK) must be installed.
Eclipse SDK 2.1.2/2.1.3 or WSAD 5.1.1/5.1.2 must be installed. Eclipse SDK 2.1.3 can be downloaded from the following address:
Graphical Editing Framework (GEF) 2.1.3 Plug-in must be installed. GEF Plug-in is distributed by Eclipse.org and can be downloaded from the following address:
Eclipse 3.0.x
Version 1.4.1 or higher of Java Runtime Environment (JRE) or Java Development Kit (JDK) must be installed.
Eclipse SDK 3.0.x must be installed. Eclipse SDK 3.0.1 can be downloaded from the following address:
Graphical Editing Framework (GEF) 3.0.x. GEF Plug-in 3.0.1 is distributed by Eclipse.org and can be downloaded from the following address: