[IronPython] SystemError: Object reference not set to an instance of an object

[Kuno Meyer]

Ok. Then you should have a look at the sources or the decompilation 
result (.NET Reflector) of

"OpenMetaverse.AgentManager+AgentMovement.SendUpdate(bool, Simulator)"

and find out which reference is not initialized. Perhaps you are missing 
some initialization calls or are using the API in a wrong way? Or you 
encountered a bug in libopenmetaverse?

Nothing specific to IronPython, I guess.


On 24.07.2010 04:32, Count László de Almásy wrote:
> ok thanks. that provided the following:
>
> Object reference not set to an instance of an object
> SendUpdate at offset 0 in file:line:column<filename unknown>:0:0
> SendUpdate at offset 0 in file:line:column<filename unknown>:0:0
> Fly at offset 0 in file:line:column<filename unknown>:0:0
> Invoke at offset 0 in file:line:column<filename unknown>:0:0
>    at OpenMetaverse.AgentManager+AgentMovement.SendUpdate (Boolean
> reliable, OpenMetaverse.Simulator simulator) [0x00000]
>    at OpenMetaverse.AgentManager+AgentMovement.SendUpdate (Boolean
> reliable) [0x00000]
>    at OpenMetaverse.AgentManager.Fly (Boolean start) [0x00000]
>    at (wrapper managed-to-native)
> System.Reflection.MonoMethod:InternalInvoke
> (object,object[],System.Exception&)
>    at System.Reflection.MonoMethod.Invoke (System.Object obj,
> BindingFlags invokeAttr, System.Reflection.Binder binder,
> System.Object[] parameters, System.Globalization.CultureInfo culture)
> [0x00000]
> SystemError: Object reference not set to an instance of an object
>
> On Fri, Jul 23, 2010 at 4:23 PM, Kuno Meyer<kuno.meyer at gmx.ch>  wrote:
>> You might want to have a look at the full stack trace (i.e. the full CLR
>> stack trace, not only the stack of the Python script).
>>
>> The "-X:ExceptionDetail" command line option (see "ipy /?") allows to see
>> that.
>>
>> On 23.07.2010 23:47, Count László de Almásy wrote:
>>>
>>> i've been using IPY 2.6.1 with Mono 2.6.x for quite some time. Today I
>>> upgraded one of my binary assemblies (libopenmetaverse) and suddenly
>>> all my applications that use it are throwing this error:
>>>
>>> Traceback (most recent call last):
>>> SystemError: Object reference not set to an instance of an object
>>>
>>> any idea what would cause this?
>>>
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>
>
>