PROBLEM SIMULINK CONNECTING BLOCKS

I try to connect a ground to the Controlled PWM Voltage block in the -ref port but it cannot be done as, some software or gui problem exists. The same problem appeared with other ports of this block. IS IT SOFTWARE BUG or AM I trying to do something "illegal" given the properties of the blocks I am trying to connect???

I use Simulink 7.6(R2010b)

Thanks

Answer 1

[Kaustubha Govind]

You cannot connect Simulink components to SimScape (SimElectronics) components. Try using the Electrical Reference block instead of the Ground block from the Simulink library.

[Andreas]

Ok thank you Kaustubha. I did that and i did make it to connect the "ground". I first tried Simulink PS converter for that but it did not work so ELECRICAL REFERENCE block seems to do the job correctly.

[Tejaswini Rao]

Thank you. I was stuck for many days. Your answer helped me.