When sending a request to a webservice I get the following error: Strange thing is that this service workes fine in Mendix 5.16.1. Since migration i t does not work anymore. Did anything change? I found some older posts on the forum about this issue. Unfortunately, without a satisfactory response. See stacktrace and WSDL below WSDL: <?xml version="1.0" encoding="utf-8"?><wsdl:definitions xmlns:soap-enc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="urn:Ad4all" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns="http://schemas.xmlsoap.org/wsdl/" name="data" targetNamespace="urn:Ad4all" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"> <wsdl:types> <xsd:schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:Ad4all"> <xsd:complexType name="notification"> <xsd:sequence> <xsd:element name="basket_code" type="xsd:string" /> <xsd:element name="order_code" type="xsd:string" /> </xsd:sequence> </xsd:complexType> <xsd:complexType name="notification_response"> <xsd:sequence> <xsd:element name="result" type="xsd:boolean" /> <xsd:element name="message" type="xsd:string" /> </xsd:sequence> </xsd:complexType> </xsd:schema> </wsdl:types> <wsdl:message name="notify"> <wsdl:part name="notification" type="tns:notification" /> </wsdl:message> <wsdl:message name="notify_response"> <wsdl:part name="notification_response" type="tns:notification_response" /> </wsdl:message> <wsdl:portType name="data_port"> <wsdl:operation name="notify"> <wsdl:input message="tns:notify" /> <wsdl:output message="tns:notify_response" /> </wsdl:operation> </wsdl:portType> <wsdl:binding name="data_binding" type="tns:data_port"> <soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="rpc" /> <wsdl:operation name="notify"> <soap:operation soapAction="notify" /> <wsdl:input> <soap:body use="encoded" namespace="urn:Ad4all" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </wsdl:input> <wsdl:output> <soap:body use="encoded" namespace="urn:Ad4all" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" /> </wsdl:output> </wsdl:operation> </wsdl:binding> <wsdl:service name="service"> <wsdl:port name="data_port" binding="tns:data_binding"> <soap:address location="http://acceptance.ad4all.nl/data/action" /> </wsdl:port> </wsdl:service></wsdl:definitions> Trace: Error: Undeclared namespace prefix "xsi" (for attribute "type") at [row,col {unknown-source}]: [1,77]: javax.xml.ws.WebServiceException: javax.xml.soap.SOAPException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 77; Undeclared namespace prefix "xsi" (for attribute "type") at [row,col {unknown-source}]: [1,77] at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:36) Caused by: javax.xml.soap.SOAPException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 77; Undeclared namespace prefix "xsi" (for attribute "type") at [row,col {unknown-source}]: [1,77] at com.sun.xml.ws.handler.SOAPMessageContextImpl.getMessage(SOAPMessageContextImpl.java:86) at com.mendix.integration.webservices.call.MtomHandler.handleMessage(MtomHandler.java:37) at com.mendix.integration.webservices.call.MtomHandler.handleMessage(MtomHandler.java:28) at com.sun.xml.ws.handler.HandlerProcessor.callHandleMessage(HandlerProcessor.java:297) at com.sun.xml.ws.handler.HandlerProcessor.callHandlersRequest(HandlerProcessor.java:138) at com.sun.xml.ws.handler.ClientSOAPHandlerTube.callHandlersOnRequest(ClientSOAPHandlerTube.java:142) at com.sun.xml.ws.handler.HandlerTube.processRequest(HandlerTube.java:120) at com.sun.xml.ws.api.pipe.Fiber._doRun(Fiber.java:641) at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:600) at com.sun.xml.ws.api.pipe.Fiber.doRun(Fiber.java:585) at com.sun.xml.ws.api.pipe.Fiber.runSync(Fiber.java:482) at com.sun.xml.ws.client.Stub.process(Stub.java:323) at com.sun.xml.ws.client.dispatch.DispatchImpl.doInvoke(DispatchImpl.java:192) at com.sun.xml.ws.client.dispatch.DispatchImpl.invoke(DispatchImpl.java:218) at com.mendix.integration.webservices.call.WebserviceCaller$3.run(WebserviceCaller.java:306) at com.mendix.integration.webservices.call.WebserviceCaller$3.run(WebserviceCaller.java:284) at java.security.AccessController.doPrivileged(Native Method) at com.mendix.integration.webservices.call.WebserviceCaller$1.execute(WebserviceCaller.java:251) at com.mendix.integration.webservices.call.WebserviceCaller$1.execute(WebserviceCaller.java:248) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.util.classloading.Runner$1.run(Runner.java:21) at java.security.AccessController.doPrivileged(Native Method) at com.mendix.util.classloading.Runner.runUsingClassLoaderOf(Runner.java:17) at com.mendix.integration.webservices.call.WebserviceCaller.call(WebserviceCaller.java:255) at com.mendix.integration.webservices.call.WebserviceCaller.call(WebserviceCaller.java:129) at com.mendix.integration.webservices.WebserviceModuleImpl.callWebservice(WebserviceModuleImpl.java:196) at com.mendix.integration.internal.InternalIntegrationImpl.callWebservice(InternalIntegrationImpl.scala:276) at com.mendix.integration.actions.microflow.CallWebServiceAction.execute(CallWebServiceAction.scala:73) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.modules.microflowengine.actions.SubMicroflowAction.execute(SubMicroflowAction.scala:43) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.core.actionmanagement.SyncEventExtendedAction.executeAfterActionsSync(SyncEventExtendedAction.java:95) at com.mendix.core.actionmanagement.SyncEventExtendedAction.executeAction(SyncEventExtendedAction.java:41) at com.mendix.core.actionmanagement.EventExtendedAction.execute(EventExtendedAction.java:92) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:191) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.actionmanagement.ActionManager.executeInTransactionSync(ActionManager.java:156) at com.mendix.core.component.InternalCore.commit(InternalCore.java:180) at com.mendix.core.component.InternalCore.commit(InternalCore.java:146) at com.mendix.modules.microflowengine.actions.mxobject.CommitAction.execute(CommitAction.scala:34) at com.mendix.modules.microflowengine.actions.mxobject.CommitAction.execute(CommitAction.scala:19) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.modules.microflowengine.actions.SubMicroflowAction.execute(SubMicroflowAction.scala:43) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.modules.microflowengine.actions.SubMicroflowAction.execute(SubMicroflowAction.scala:43) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction$$anonfun$executeLoop$2.apply(NestedLoopMicroflowAction.scala:67) at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction$$anonfun$executeLoop$2.apply(NestedLoopMicroflowAction.scala:58) at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:778) at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48) at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:777) at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.executeLoop(NestedLoopMicroflowAction.scala:58) at com.mendix.modules.microflowengine.actions.other.NestedLoopedMicroflowAction.execute(NestedLoopMicroflowAction.scala:41) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.executeSync(InternalCore.java:468) at com.mendix.modules.microflowengine.actions.SubMicroflowAction.execute(SubMicroflowAction.scala:43) at com.mendix.modules.microflowengine.microflow.impl.MicroflowObject.execute(MicroflowObject.java:47) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAfterBreakingIfNecessary(MicroflowImpl.java:192) at com.mendix.modules.microflowengine.microflow.impl.MicroflowImpl.executeAction(MicroflowImpl.java:149) at com.mendix.systemwideinterfaces.core.UserAction.execute(UserAction.java:49) at com.mendix.core.actionmanagement.CoreAction.doCall(CoreAction.java:260) at com.mendix.core.actionmanagement.CoreAction.call(CoreAction.java:248) at com.mendix.core.actionmanagement.ActionManager$1.execute(ActionManager.java:188) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.actionmanagement.ActionManager.executeSync(ActionManager.java:194) at com.mendix.core.component.InternalCore.execute(InternalCore.java:386) at com.mendix.webui.actions.client.ExecuteAction.execute(ExecuteAction.java:135) at com.mendix.webui.requesthandling.ClientRequestHandler$$anonfun$handleRequest$1.apply$mcV$sp(ClientRequestHandler.scala:322) at com.mendix.webui.requesthandling.ClientRequestHandler$$anonfun$handleRequest$1.apply(ClientRequestHandler.scala:315) at com.mendix.webui.requesthandling.ClientRequestHandler$$anonfun$handleRequest$1.apply(ClientRequestHandler.scala:315) at com.mendix.core.session.Worker$$anonfun$receive$3$$anonfun$2$$anon$1.execute(ActionDispatching.scala:145) at com.mendix.util.classloading.Runner.doRunUsingClassLoaderOf(Runner.java:32) at com.mendix.core.session.Worker$$anonfun$receive$3$$anonfun$2.apply(ActionDispatching.scala:147) at scala.util.Try$.apply(Try.scala:191) at com.mendix.core.session.Worker$$anonfun$receive$3.applyOrElse(ActionDispatching.scala:141) at akka.actor.Actor$class.aroundReceive(Actor.scala:465) at com.mendix.core.session.Worker.aroundReceive(ActionDispatching.scala:137) at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516) at akka.actor.ActorCell.invoke(ActorCell.scala:487) at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:238) at akka.dispatch.Mailbox.run(Mailbox.scala:220) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 77; Undeclared namespace prefix "xsi" (for attribute "type") at [row,col {unknown-source}]: [1,77] at com.sun.xml.ws.message.AbstractMessageImpl.readAsSOAPMessage(AbstractMessageImpl.java:200) at akka.dispatch.Mailbox.run(Mailbox.scala:220) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) (rest of stacktrace) Soap: null: null