topic Problem with tDotNet Components in Talend Studio

Problem with tDotNet Components

sjm — Mon, 13 Jan 2020 12:06:21 GMT

Hi,

I am trying out the following components tDotNetInstantiate and tDotNetRow (Talend Open Studio 7.2). I have successfully completed the examples in Talend documentation (https://help.talend.com/reader/jomWd_GKqAmTZviwG_oxHQ/uxiSSj3xwcSy5zNMKgnfkA?section=dotnet-tdotnetrow-sce1)

However if I publish a DLL from Visual Studio in 32 bit (x86) rather than 64 bit and try and reference this, I receive an error message..

System.BadImageFormatException: Could not load file or assembly 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/HelloWorld.dll' or one of its dependencies. is not a valid Win32 application.

Is it possible to run a 32 bit dll from 64 bit TOS in this example? The reason I ask is I have a requirement to access a legacy dll for a data process.

thanks!

Re: Problem with tDotNet Components

fdenis — Tue, 14 Jan 2020 09:22:31 GMT

did you install corresponding runtime?

"To use this component, you must first install the runtime DLLs, for example janet-win32.dll for Windows32-bit version and janet-win64.dll for Windows 64-bitversion, from the corresponding Microsoft Visual C++ Redistributable Package. This allows you to avoid errors like the Unsatisfied Link Error on dependent DLL. "

regards

Re: Problem with tDotNet Components

sjm — Tue, 14 Jan 2020 12:38:55 GMT

Hi,

thanks for your reply, yes I did do that. Although I wasn't sure of the actual installation process, I just placed a copy of these files in C:\Windows\System32 and the bin folder of the Java installation, where do they actually need to be installed?

The tDotNet components do work with a simple dll I created. I think the problem is if I create a dll as 32 bit and use that in the components (which is what I need to do) it doesn't seem to like the 64 bit environment (Windows/Talend/Java) I am trying to run it in ?

Re: Problem with tDotNet Components

pbz1983 — Sun, 08 Mar 2020 15:06:00 GMT

To add a little value to the thread, I have issues since upgrading from TOS 6.5 > 7.2.1 + 7.3.1 (and also multiple M versions in between).

In my 'live' projects I pass data via tRowGenerator to the tDotNetRow component and since v7 it results in error.

example;

System.InvalidCastException: Unable to cast object of type 'System.NullReferenceException' to type 'System.Reflection.Assembly'.
at Java_org_talend_net_Object_createInstanceLib(JNIEnv_* env, _jobject* _this, _jstring* className, _jobject* jAssembly, _jobjectArray* params, _jobjectArray* types)

I believe the values are not being passed through to the component.

Please can this be investigated further..........

Re: Problem with tDotNet Components

Anonymous — Mon, 13 Apr 2020 13:05:12 GMT

i am also getting same issue, someone please help

Re: Problem with tDotNet Components

Anonymous — Fri, 01 May 2020 12:44:34 GMT

i also upgraded the studio version 7.2 to 7.3 i placed the janet dlls in java run time as well as windows/system32

i have installed vc++ redistributable and .net frame work previous it is working without any issues while running in 7.3 getting this error can anyone help me on this

[WARN ]: org.eclipse.jetty.server.handler.ContextHandler - Empty contextPath
System.InvalidCastException: Unable to cast object of type 'System.NullReferenceException' to type 'System.Reflection.Assembly'.
at Java_org_talend_net_Object_createInstanceLib(JNIEnv_* env, _jobject* _this, _jstring* className, _jobject* jAssembly, _jobjectArray* params, _jobjectArray* types)
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (0xe0434352), pid=9136, tid=0x0000000000001f14
#
# JRE version: Java(TM) SE Runtime Environment (8.0_241-b07) (build 1.8.0_241-b07)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.241-b07 mixed mode windows-amd64 compressed oops)
# Problematic frame:
# C [KERNELBASE.dll+0x39159]

Capture.PNG

Re: Problem with tDotNet Components

diemerga — Fri, 08 Jan 2021 14:44:06 GMT

Same problem here, i resolved it by using the dll from https://talend-update.talend.com/nexus/content/repositories/libraries/org/talend/libraries/janet-dll_40/1.0/janet-dll_40-1.0.zip. Probably it is a specific .net version dependency and this is a newer builded...

Re: Problem with tDotNet Components

Ram12 — Thu, 27 May 2021 15:15:06 GMT

This solution helped. Thank you very much.

Re: Problem with tDotNet Components

MisterJack — Fri, 04 Aug 2023 13:33:50 GMT

Hello,

Before use the good version of janet i had this error:

System.InvalidCastException: Unable to cast object of type 'System.NullReferenceException' to type 'System.Reflection.Assembly'.

I used the specific janet dll but i had again an error:

System.InvalidCastException: Unable to cast object of type 'System.AccessViolationException' to type 'System.Reflection.Assembly'.

To resolve it, in Talend Studioin the module panel, make sure you use janet-java-1.2.jar for tDotnet component. In my case I used the janet-java-1.1.jar and it was the problem.

Hope it helps you.