Why doesnt it work?

4
OK, just installed Mendix 2.5.0 RC1, 2.4.6 runs completely ok on my machine. Started the modeler, made a very simple project. No errors, no warnings. Press F5 and voila ....... nothing. Just a dirty java error....... Yes, by the way, downloaded the newest JDK, tried again. The same issue. Also installed the latest .NET runtimer, version 4. Nothing. Same problem. Someone any idea? System.MissingMethodException: Methode niet gevonden: Boolean System.Runtime.Serialization.DataContractAttribute.getIsReference(). at Newtonsoft.Json.Serialization.DefaultContractResolver.InitializeContract(JsonContract contract) at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract(Type objectType) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Serialization\DefaultContractResolver.cs:line 157 at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateContract(Type objectType) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Serialization\DefaultContractResolver.cs:line 344 at Newtonsoft.Json.Utilities.ThreadSafeStore2.AddValue(TKey key) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Utilities\ThreadSafeStore.cs:line 34 at Newtonsoft.Json.Utilities.ThreadSafeStore2.Get(TKey key) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Utilities\ThreadSafeStore.cs:line 23 at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type type) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Serialization\DefaultContractResolver.cs:line 86 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\Serialization\JsonSerializerInternalReader.cs:line 114 at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\JsonSerializer.cs:line 402 at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\JsonConvert.cs:line 692 at Newtonsoft.Json.JsonConvert.DeserializeObjectT in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\JsonConvert.cs:line 654 at Newtonsoft.Json.JsonConvert.DeserializeObjectT in d:\Development\Source\Json\trunk\Src\Newtonsoft.Json\JsonConvert.cs:line 611 at Mendix.M2EE.M2EEResponse.FeedbackAsTResult in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EEResponse.cs:line 77 at Mendix.M2EE.M2EEClient.GetDdlCommands() in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EEClient.cs:line 275 at Mendix.M2EE.M2EERuntimeControl.StartRuntime(M2EEClient client, Boolean askToSyncDb) in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EERuntimeControl.cs:line 137 at Mendix.M2EE.M2EERuntimeControl.<>cDisplayClassa.<performstartup>b9(M2EEClient client) in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EERuntimeControl.cs:line 114 at Mendix.M2EE.M2EERuntimeControl.ClientDo(Action`1 action) in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EERuntimeControl.cs:line 226 at Mendix.M2EE.M2EERuntimeControl.<>cDisplayClassa.<performstartup>b8() in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.M2EE\M2EERuntimeControl.cs:line 102 at Mendix.Modeler.Utility.Dialogs.<>cDisplayClassa.<progressdo>b9(WorkerTaskInfo info) in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.Modeler.Utility.Gui\Dialogs.cs:line 268 at Mendix.Modeler.Utility.WorkerTask.backgroundWorkerDoWork(Object sender, DoWorkEventArgs e) in c:\cygwin\home\autobuild\tmp\build2-2.5.0-rc1\src\Mendix.Modeler.Utility\WorkerTask.cs:line 137 at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
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2 answers
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This is an error that occurs when the .NET Framework version 3.5 is installed, but Service Pack 1 is not. The solution is to download and install the .NET Framework 3.5 Service Pack 1. You can find the link at our "Moving from 2.4 to 2.5" documentation page under the heading "System Requirements".

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Dear Wim,

Would you please specify your problem? What are you trying to do? Has it something to do with a custom widget? etc.

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