[Ironpython-users] AccessViolationException on Python.CreateEngine() call

[Igor Brejc]

Hi Jeff,

One question: I'm looking at the codeplex SVN repository (since I assume
this is where 2.6.2 code still resides). What exactly do I need to check out
in order to be able to build it? IronPython_2_6 directory or the whole
repository? There seems to be a lot of stuff in the IronPython_Main dir.

Thanks,
Igor

On Mon, Aug 8, 2011 at 7:17 PM, Igor Brejc <igor.brejc at gmail.com> wrote:

> Hi Jeff,
>
> Thanks for responding. I'll update the SO question if/when someone (I guess
> it will probably have to be me) figures out what the problem is.
>
> One update: we did some more debugging. The user installed IronPython 2.6.2
> msi (.NET 2.0) and ipy64.exe breaks down when run. I guess this excludes any
> of my code or the fact that IP was used outside of GAC.
>
> What's strange is that sometimes it's AccessViolationException and
> sometimes NullReferenceException (but the failing method is the same).
>
> So I guess I'll need to build a custom IP build with some log4net logging
> of that method, since live debugging is not a realistic option here.
>
> Thanks for your help,
> Igor
>
>
> On Mon, Aug 8, 2011 at 6:12 PM, Jeff Hardy <jdhardy at gmail.com> wrote:
>
>> Hi Igor,
>>
>> The exception is occurring somewhere in IronPython's COM interop code,
>> but I'm not exactly sure why - the code where the exception occurred
>> pulls COM types out of interop assemblies. You'll have to (somehow)
>> figure out what assembly is getting loaded in the AppDomain when the
>> exception happens, which will probably require live debugging or a
>> custom IronPython build.
>>
>> I'm not sure if it's a bug in IronPython, or if there's a squirrelly
>> COM object on the user's machine that causes IronPython to break, but
>> my guess is the latter.
>>
>> - Jeff
>>
>> P.S. I saw your SO question before this, but feel free to keep the
>> discussion where ever you prefer.
>>
>> On Sat, Aug 6, 2011 at 11:12 PM, Igor Brejc <igor.brejc at gmail.com> wrote:
>> > Hi,
>> >
>> > I'm developing a cartography application (http://maperitive.net) in C#
>> > and I plan to use IronPython as a scripting extension of the
>> > application. I've been successfully using IronPython for several
>> > months and most users don't have any issues with it, but a small
>> > percentage of users is having problems.
>> >
>> > With the help from one of them I managed to dig out the exception
>> > stack trace. The exception occurs while calling the
>> > Python.CreateEngine() method:
>> >
>> > System.Reflection.TargetInvocationException: Exception has been thrown
>> > by the target of an invocation.
>> > ---> System.Reflection.TargetInvocationException:
>> > Failed to load language 'IronPython 2.6.2': Attempted to read or write
>> > protected memory. This is often an indication that other memory is
>> > corrupt.
>> > ---> System.AccessViolationException: Attempted to read or write
>> > protected memory. This is often an indication that other memory is
>> > corrupt.
>> > at
>> Microsoft.Scripting.Actions.TopNamespaceTracker.PublishComTypes(Assembly
>> > interopAssembly)
>> > at
>> IronPython.Runtime.Binding.PythonBinder.DomainManager_AssemblyLoaded(Object
>> > sender, AssemblyLoadedEventArgs e)
>> > at IronPython.Runtime.Binding.PythonBinder..ctor(PythonContext
>> > pythonContext, CodeContext context)
>> > at IronPython.Runtime.PythonContext..ctor(ScriptDomainManager manager,
>> > IDictionary`2 options)
>> > --- End of inner exception stack trace ---
>> > at
>> Microsoft.Scripting.Runtime.LanguageConfiguration.LoadLanguageContext(ScriptDomainManager
>> > domainManager, Boolean& alreadyLoaded)
>> > at
>> Microsoft.Scripting.Runtime.DlrConfiguration.LoadLanguageContext(ScriptDomainManager
>> > manager, LanguageConfiguration config)
>> > at
>> Microsoft.Scripting.Runtime.DlrConfiguration.TryLoadLanguage(ScriptDomainManager
>> > manager, AssemblyQualifiedTypeName providerName, LanguageContext&
>> > language)
>> > at
>> Microsoft.Scripting.Runtime.ScriptDomainManager.GetLanguageByTypeName(String
>> > providerAssemblyQualifiedTypeName)
>> > at Microsoft.Scripting.Hosting.ScriptRuntime.GetEngineByTypeName(String
>> > assemblyQualifiedTypeName)
>> > at IronPython.Hosting.Python.GetEngine(ScriptRuntime runtime)
>> >
>> > I couldn't find anything on Google that would be related to this. Some
>> > info about the user's environment:
>> >
>> > - Win7 64bit
>> > - Using .NET 2.0-3.5 (not 4.0)
>> > - IronPython is not installed in GAC, the app uses assemblies locally
>> > on the disk (v 2.6.2)
>> > - The user runs the application as an ordinary user (not administrator)
>> >
>> > I use Win7 64bit myself, but I didn't have any such problems and I
>> > cannot reproduce this problem on any of my machines (Win7, Ubuntu).
>> >
>> > Thanks for any help,
>> > Igor Brejc
>> > _______________________________________________
>> > Ironpython-users mailing list
>> > Ironpython-users at python.org
>> > http://mail.python.org/mailman/listinfo/ironpython-users
>> >
>>
>
>
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