NullPointerException at com.eviware.soapui.impl.wsdl.teststeps.ProJdbcRequestTestStep

Hi there, we're seeing the following stacktrace in our build logs. Any ideas what might be causing this? Step "Empty orders tables" calls a stored procedure. We're using Ready! API 1.5.0.

14:23:04,640 INFO [SoapUIProTestCaseRunner] Running TestCase [BulkImportTestData]
14:23:04,703 INFO [SoapUIProTestCaseRunner] running step [Empty orders tables]
14:23:21,429 INFO [SoapUIProTestCaseRunner] Assertion [JDBC Timeout] has status VALID
14:23:21,429 INFO [SoapUIProTestCaseRunner] Assertion [JDBC Status] has status VALID
14:23:21,429 INFO [SoapUIProTestCaseRunner] Assertion [XPath Match Update Count] has status VALID
14:23:21,431 ERROR [AbstractTestCaseRunner] Error notifying listener after step
java.lang.NullPointerException
at com.eviware.soapui.impl.wsdl.teststeps.ProJdbcRequestTestStep.a(ProJdbcRequestTestStep.java:111)
at com.eviware.soapui.impl.wsdl.teststeps.ProJdbcRequestTestStep.applyEnvironment(ProJdbcRequestTestStep.java:87)
at com.eviware.soapui.impl.wsdl.teststeps.ProJdbcRequestTestStep.resetEnvironment(ProJdbcRequestTestStep.java:93)
at com.smartbear.ready.cmd.runner.pro.SoapUIProTestCaseRunner.afterStep(SoapUIProTestCaseRunner.java:272)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.notifyListenersAfterStep(AbstractTestCaseRunner.java:273)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.runTestStep(AbstractTestCaseRunner.java:243)
at com.eviware.soapui.impl.wsdl.testcase.WsdlTestCaseRunner.runCurrentTestStep(WsdlTestCaseRunner.java:47)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:148)
at com.eviware.soapui.impl.wsdl.support.AbstractTestCaseRunner.internalRun(AbstractTestCaseRunner.java:1)
at com.eviware.soapui.impl.wsdl.support.AbstractTestRunner.run(AbstractTestRunner.java:130)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)