command line invocation of agent issues ERROR

This is how I'm trying to run a loadUI project on an agent, using the command line:

./loadUI-cmd.command -p /home/jdoe/Workspace/loadUI-Projects/my-project.xml -t Main -L 60:0:0 -a 10.32.33.7 -r /home/jdoe/Desktop/loadUI-Reports/ -F PDF

This is the error that I'm seeing:

19:26:00,725 ERROR [CommandRunner] An error occured when executing the script
groovy.lang.MissingPropertyException: No such property: runners for class: com.eviware.loadui.impl.model.WorkspaceItemImpl
 at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:49)
 at org.codehaus.groovy.runtime.callsite.GetEffectivePojoPropertySite.getProperty(GetEffectivePojoPropertySite.java:63)
 at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:235)
 at Script1.run(Script1.groovy:40)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:576)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:614)
 at groovy.lang.GroovyShell.evaluate(GroovyShell.java:585)
 at com.eviware.loadui.cmd.CommandRunner$CommandRunnable.run(CommandRunner.java:86)
 at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
 at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
 at java.util.concurrent.FutureTask.run(FutureTask.java:138)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
 at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)
 at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
 at java.lang.Thread.run(Thread.java:619)
Stopping Framework...