Dll project : Mixed mode assembly is built against version ‘v2.0.50727′ of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

[former_member593670]

Hi I have a dll project in C#.

I try to update his framework from 2 to 4.

Now when I use : SetDataSource, I have the error:

Mixed mode assembly is built against version ‘v2.0.50727′ of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.

I try to create an app.config file with:

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

  <startup useLegacyV2RuntimeActivationPolicy="true">

    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>

</startup>

  </configuration>

When I compile I have those file : myapp.dll and myapp.dll.config and planning.rpt

I use this dll in an other winform project (dll project is for plugin)

This winform project use also crstal report and I have an app.Config with the supportedRuntime line and there is no problem.

Have you a solution?

Thank you.

Gwenael

[former_member183750 · Accepted solution]

Hi Gwena

Not sure if this will make any difference - just going by KBA 1525432 and 1870767. Change

  <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>

to

  <supportedRuntime version="v4.0"/>

- Ludek

Senior Support Engineer AGS Product Support, Global Support Center Canada

Follow us on Twitter

[former_member593670 · Accepted solution]

Hi Ludek I already try <supportedRuntime version="v4.0"/> and I still have the problem.

[former_member183750 · Accepted solution]

What is the version of VS you are using (2010, 2012, 2013)?

What is the version of the CR assemblies referenced in your project?

What is the version of the crpe32.dll in this folder:

C:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win32_x86

- Ludek

[former_member593670 · Accepted solution]

I use VS 2010.

The version of the CR assemblies is : 13.0.2000.0

The version of the crpe32.dll is : 13.0.5.891

[former_member183750 · Accepted solution]

13.0.5.891 means you are using Service Pack 5. Latest available SP is SP 10. Please see if that helps:

If SP 10 does not help, please attach your config file here.

- Ludek

[former_member593670 · Accepted solution]

The version of crpe32.dll in :

C:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win64_x64 is now 13.0.10.1385

I download the version 32 bit too.

The version of the CR assemblies reference in my projec is still : 13.0.2000.0. Is it normal?

I still have the problem.

My app.config is

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

  <startup useLegacyV2RuntimeActivationPolicy="true">

    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>

</startup>

  </configuration>

There is nothing else in the file, I just create it because I have the bug.

I recall you that my VS project create a dll (plugin) with a rpt that is used in an other VS winform project.

The winform use rpt too and the line <supportedRuntime version="v4.0"/> in is app.config work.

I have an other dll project (an other plugin) that use crystal report but the rpt don't use dataset and there is no problem.

But in the case where I have the problem I can not create the rpt without dataset.so I think thaht the problem is that I use a dll project that is used in a winform project.

I attach the text of the config file of my winform project.

appConfig.txt.zip

[former_member183750 · Accepted solution]

Referencing:

I recall you that my VS project create a dll (plugin) with a rpt that is used in an other VS winform project.

What happens if you create a config file for that project?

What happens if you create a new simple test project that just displays the report. E.g.; without going to another winform project?

- Ludek

[former_member593670 · Accepted solution]

Hi,

I already create a config file for the dll project and the winform project.

The config file for dll project is that I post in my first message and the config file for the winform project I attach it in my last post.

The winform project that use crystal report with a lot of .rpt file work with the line (in config file):

<startup useLegacyV2RuntimeActivationPolicy="true">

    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>

</startup>

If I create a simple project winform that display this report I think that it will work

[former_member593670 · Accepted solution]

Hi have you find a solution?

[former_member183750 · Accepted solution]

Well, I was under the impression that you were on the right path:

If I create a simple project winform that display this report I think that it will work

So, we know CR works. Now you have to figure out what is going on in your actual app. Is the config file being read by the CR engine? I suspect not. Process Monitor may tell you. As I have limited knowledge of your app, it will be up to you to figure out how to get the config file to be read(?).

- Ludek

[former_member593670 · Accepted solution]

Hi, we found a solution, we add "useLegacyV2RuntimeActivationPolicy="true"" in the config file of the winform project because it is this config file that is read and used.

Thank you for your help.

Gwenael