I'm trying to update an extension in Integration Studio 9.1.608.0 and getting the following compilation error.  How does one change the .NET framework version from 3.5 to 4.0?

.NET Compilation.

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(983,5): error MSB3645: .NET Framework v3.5 Service Pack 1 was not found. In order to target ".NETFramework,Version=v3.5", .NET Framework v3.5 Service Pack 1 or later must be installed.

C:\Windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.Common.targets(983,5): warning MSB3644: The reference assemblies for framework ".NETFramework,Version=v3.5" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.


can you share us a print screen from your Options Screen of Integration Studio -> Tab .Net ?

maybe the paths are not correct or you are really missing the correct SDK,



When you open your extension in Visual Studio you can change the Target Framework in the project properties.


João Rosado