System.Core not found

Dec 4, 2008 at 9:14 AM
Edited Dec 4, 2008 at 11:46 AM


if I try to customize the choices of a choice property, I get an error that the assembly System.Core was not found.
The same happens when I try to delete an existing property.

Any idea where the problem appears and how I can solve it?

Thanks in advance.

Dec 4, 2008 at 11:48 AM

Problem solved, i had'nt thought about the .net framework.
After installing 3.5 it works.