Hello,
This should work just fine, as long as the design still matches that of Multisim (and the Multisim design is open). Maybe you are working with different designs. What i mean is, this might be due to a synchronization error, where if you made changes in either or and the changes weren't reflected back to the file (through forward/backward annotation). I'm trying very hard right now to reproduce this, I find it really difficult, even on complex designs with HBs and SCs completely changed in Ultiboard.
I should mention just as a sanity check that the component should be selected Component Selector active. The only time that the option is greyed out is when Ultiboard is open and no file loaded. Maybe provide us with your files again (by email if you prefer)?
Kind regards,
Miguel V
National Instruments
