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Troubleshooting
Problem
After an IBM MQ Server Fix Pack update, a .NET application fails to connect to a queue manager with the following exception:
System.TypeInitializationException: The type initializer for 'IBM.WMQ.Nmqi.BindingsNmqiMQ' threw an exception. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at IBM.WMQ.Nmqi.NativeManager.InitializeNativeApis(String mode)
at IBM.WMQ.Nmqi.BindingsNmqiMQ..cctor()
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Reflection.Assembly.CreateInstance(String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at IBM.WMQ.Nmqi.NmqiEnvironment.GetInstance(String name)
at IBM.WMQ.Nmqi.NmqiEnvironment.GetMQI(Int32 id)
at IBM.WMQ.MQQueueManager.Connect(String queueManagerName)
at IBM.WMQ.MQQueueManager..ctor(String queueManagerName, Hashtable properties)
at MQ_WebService.MQ_WebService.SendToQueue(String messageString, String QueueName, String QueueMgrName)
at IBM.WMQ.Nmqi.NativeManager.InitializeNativeApis(String mode)
at IBM.WMQ.Nmqi.BindingsNmqiMQ..cctor()
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Reflection.Assembly.CreateInstance(String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at IBM.WMQ.Nmqi.NmqiEnvironment.GetInstance(String name)
at IBM.WMQ.Nmqi.NmqiEnvironment.GetMQI(Int32 id)
at IBM.WMQ.MQQueueManager.Connect(String queueManagerName)
at IBM.WMQ.MQQueueManager..ctor(String queueManagerName, Hashtable properties)
at MQ_WebService.MQ_WebService.SendToQueue(String messageString, String QueueName, String QueueMgrName)
Document Location
Worldwide
[{"Type":"MASTER","Line of Business":{"code":"LOB77","label":"Automation Platform"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSYHRD","label":"IBM MQ"},"ARM Category":[{"code":"a8m0z00000008PAAAY","label":"DOTNET-\u003E.NET Classes"}],"ARM Case Number":"","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"All Versions"}]
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Historical Number
TS014204999
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Document Information
More support for:
IBM MQ
Component:
DOTNET->.NET Classes
Software version:
All Versions
Document number:
7071660
Modified date:
28 April 2025
UID
ibm17071660
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