Hi,
Could you please try adding Guava as a dependency of the maven-soapui-pro-plugin like the following:
<plugin>
<groupId>eviware</groupId>
<artifactId>maven-soapui-pro-plugin</artifactId>
<version>4.0.0</version>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>12.0</version>
</dependency>
</dependencies>
.....
</plugin>
For more information about the Maven plugin, please refer to the SoapUI docs:
http://www.soapui.org/Test-Automation/maven-2x.htmlLet us know if the problem persists and you neeed more help.