Why do I get an error when trying to add a web reference in a Script Task (SSIS)?

I'm trying to add a web reference in a SSIS-package on a clients server in order to communicate with a web service.

In my script task I'm able to add the web reference, reference it in the code, build successfully and save it.

BUT when I exit the script task editor I get a script error saying "Script contained in the package have compilation errors. Do you want to save changes?"

If I press Yes here my script task gets an red cross on it and it says "The binary code for the script is not found.".

Even if I create a new poject, add a script task, add the web reference (no other code in the Script Task) with the same result.

However, it works great adding the same reference as a service reference instead, no errors. The problem is that the owner of this webservice said explicitly that I had to use a web reference since it's methods are VS2005 Web Service methods.

I tried the same thing on my local computer and it worked with web references! The only difference I could think of is that I use Microsft Visual Studio 2012 (Data Tools) on my local machine and the server uses Microsoft Visual Studio 2010 (Data Tools).

I also tried to create the SSIS-package on my computer, move it to the server, open it (no errors if i didn't changed anything in the Script Task) and then run the package. Got the following error message "Exception has been thrown by the target of an invocation".

In this case if I opened the Script Task and did any change (even add a comment) I got the same error (The binary code for the script is not found.) after exiting the Script Task.

What I've tried:

• Run project in both 32Bit Runtime and 64Bit Runtime.
• Set DelayValidation to True
• Change URL Behavior for the Web Reference to Static.
• Tried debugging, also "extended" debugging according to http://blog.fredrikhaglund.se/blog/2009/12/22/debugging-exception-has-been-thrown-by-the-target-of-an-invocation/.
• Checked the rights off the user running VS (In Component Services, Microsoft SQL Server Integration Services 11.0), the user has full rights.
• Run Visual Studio as administrator.
• Add a web reference to a completely different web service, same error.

Other information:

• Server: Windows Server 2012

• Internet access on server

• .NET Framework 2.0,3.0,3.5 and 4.5 is installed on the server.

• Client Tools SDK and Client Tools Backwards Compatiblity is installed on the server.

I've search all over the web for people with a solution to this problem but haven't found any. So I'm turning to SO, how can I solve this problem?

Thanks in advance!

To overcome the disappearing webreference you can try to add the client proxycode manually to your solution:

1. Open Script component 'Select all files' icon in the solution explorer
2. Drill down to webreference, and locate reference.cs file
3. Copy the content of this file to a new class file.
4. Delete the webreference
5. Recompile your code, save and exit
6. Open your project to see whether the reference is saved.