If you get an error like this, chances are that your MIDL compiler is too old. Try using a more recent one by downloading a recent platform SDK. If you are still using Visual C++ 6.0 look at this post for the last compatible PSDK .

Today while trying to open an InfoPath 2007 form I got the following error: Form template: http://MyServerName/forms/form.xsn InfoPath cannot open the selected form because of an error in the form's code. The Microsoft .NET Framework 1.1 is not installed...

Having had recently the need to use the old Visual Studio 6.0 (specifically Visual C++ 6.0), I discovered that the last Platform SDK compatible with this IDE is the February 2003 edition .