LoadUI agent on windows errors

Hi

i have a testcase is SoapUi - 2 steps only
first step - DataGen - create random numbers
second step - rest - http request.

running it from SoapUI or LoadUI locally is OK.
when i try to run it on remote PC with windows agent, i see in LoadUI SoapRunner that many requests are discarded and in the agent log i see:

16:53:00,077 ERROR [SoapUI] An error occured [Document changed during select], see error log for details
java.util.ConcurrentModificationException: Document changed during select
at org.apache.xmlbeans.impl.store.Path$XbeanPathEngine.next(Path.java:459)
at org.apache.xmlbeans.impl.store.Cursor._toSelection(Cursor.java:931)
at org.apache.xmlbeans.impl.store.Cursor._getSelectionCount(Cursor.java:946)
at org.apache.xmlbeans.impl.store.Cursor.getSelectionCount(Cursor.java:2706)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:468)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:446)
at com.eviware.soapui.support.xml.XmlObjectConfigurationReader.readString(XmlObjectConfigurationReader.java:89)
at com.eviware.soapui.impl.wsdl.teststeps.datagen.NumberProperty.load(SourceFile:54)
at com.eviware.soapui.impl.wsdl.teststeps.datagen.AbstractDataGeneratorProperty.init(SourceFile:100)
at com.eviware.soapui.impl.wsdl.teststeps.datagen.AbstractDataGeneratorProperty.init(SourceFile:25)
at com.eviware.soapui.support.registry.AbstractRegistry.build(AbstractRegistry.java:58)
at com.eviware.soapui.impl.wsdl.teststeps.datagen.WsdlDataGeneratorTestStep.afterLoad(SourceFile:79)
at com.eviware.soapui.impl.wsdl.AbstractWsdlModelItem.afterLoad(AbstractWsdlModelItem.java:214)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.getTestCase(SoapUISamplerComponent.java:884)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.run(SoapUISamplerComponent.java:799)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent.sample(SoapUISamplerComponent.java:679)
at com.eviware.loadui.impl.component.categories.RunnerBase.doSample(RunnerBase.java:406)
at com.eviware.loadui.impl.component.categories.RunnerBase.access$600(RunnerBase.java:65)
at com.eviware.loadui.impl.component.categories.RunnerBase$Worker.run(RunnerBase.java:686)
at com.eviware.loadui.util.dispatch.CustomThreadPoolExecutor$Worker.run(CustomThreadPoolExecutor.java:188)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at com.eviware.soapui.impl.wsdl.teststeps.datagen.WsdlDataGeneratorTestStep$PropertyProxy.getName(SourceFile:214)
at com.eviware.soapui.impl.wsdl.teststeps.WsdlTestStepWithProperties.addProperty(WsdlTestStepWithProperties.java:97)
at com.eviware.soapui.impl.wsdl.teststeps.WsdlTestStepWithProperties.addProperty(WsdlTestStepWithProperties.java:89)
at com.eviware.soapui.impl.wsdl.teststeps.datagen.WsdlDataGeneratorTestStep.afterLoad(SourceFile:82)
at com.eviware.soapui.impl.wsdl.AbstractWsdlModelItem.afterLoad(AbstractWsdlModelItem.java:214)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.getTestCase(SoapUISamplerComponent.java:884)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.run(SoapUISamplerComponent.java:799)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent.sample(SoapUISamplerComponent.java:679)
at com.eviware.loadui.impl.component.categories.RunnerBase.doSample(RunnerBase.java:406)
at com.eviware.loadui.impl.component.categories.RunnerBase.access$600(RunnerBase.java:65)
at com.eviware.loadui.impl.component.categories.RunnerBase$Worker.run(RunnerBase.java:686)
at com.eviware.loadui.util.dispatch.CustomThreadPoolExecutor$Worker.run(CustomThreadPoolExecutor.java:188)
at java.lang.Thread.run(Unknown Source)
java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedConstructorAccessor53.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.eviware.soapui.impl.wsdl.teststeps.assertions.AbstractTestAssertionFactory.buildAssertion(AbstractTestAssertionFactory.java:101)
at com.eviware.soapui.impl.wsdl.teststeps.assertions.TestAssertionRegistry.buildAssertion(TestAssertionRegistry.java:111)
at com.eviware.soapui.impl.wsdl.support.assertions.AssertionsSupport.addWsdlAssertion(AssertionsSupport.java:63)
at com.eviware.soapui.impl.wsdl.support.assertions.AssertionsSupport.<init>(AssertionsSupport.java:55)
at com.eviware.soapui.impl.wsdl.teststeps.RestTestRequest.initAssertions(RestTestRequest.java:99)
at com.eviware.soapui.impl.wsdl.teststeps.RestTestRequest.<init>(RestTestRequest.java:69)
at com.eviware.soapui.impl.wsdl.teststeps.RestTestRequestStep.buildTestRequest(RestTestRequestStep.java:212)
at com.eviware.soapui.impl.wsdl.teststeps.RestTestRequestStep.<init>(RestTestRequestStep.java:99)
at com.eviware.soapui.impl.wsdl.teststeps.registry.RestRequestStepFactory.buildTestStep(RestRequestStepFactory.java:71)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCase.createTestStepFromConfig(WsdlTestCase.java:297)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCase.<init>(WsdlTestCase.java:98)
at com.eviware.soapui.impl.wsdl.WsdlTestCasePro.<init>(SourceFile:28)
at com.eviware.soapui.impl.wsdl.WsdlTestSuitePro.buildTestCase(SourceFile:63)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.getTestCase(SoapUISamplerComponent.java:883)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent$SoapUITestCaseRunner.run(SoapUISamplerComponent.java:799)
at com.eviware.loadui.components.soapui.SoapUISamplerComponent.sample(SoapUISamplerComponent.java:679)
at com.eviware.loadui.impl.component.categories.RunnerBase.doSample(RunnerBase.java:406)
at com.eviware.loadui.impl.component.categories.RunnerBase.access$600(RunnerBase.java:65)
at com.eviware.loadui.impl.component.categories.RunnerBase$Worker.run(RunnerBase.java:686)
at com.eviware.loadui.util.dispatch.CustomThreadPoolExecutor$Worker.run(CustomThreadPoolExecutor.java:188)
at java.lang.Thread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException: Document changed during select
at org.apache.xmlbeans.impl.store.Path$XbeanPathEngine.next(Path.java:459)
at org.apache.xmlbeans.impl.store.Cursor._toSelection(Cursor.java:931)
at org.apache.xmlbeans.impl.store.Cursor._getSelectionCount(Cursor.java:946)
at org.apache.xmlbeans.impl.store.Cursor.getSelectionCount(Cursor.java:2706)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:468)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:446)
at com.eviware.soapui.support.xml.XmlObjectConfigurationReader.readString(XmlObjectConfigurationReader.java:89)
at com.eviware.soapui.impl.wsdl.teststeps.assertions.basic.SimpleContainsAssertion.<init>(SimpleContainsAssertion.java:67)
... 24 more


Please advise

Thanks