SigmaStudio compilation error

Hi,

I installed SigmaStudio4.1 on my computer. In order to familiarize myself with the tool, I wanted to start compiling and testing the sample programs provided in the SigmaStudio installation folder.

However, the examples do not compile.

The schematic above is an example to control the volume.

But if I use it, I have the following message error:

What should I do to remedy this problem???

Thank you!!!