[Chimera-users] Error when making Covalent bonds

[David Chenoweth]

Hi!

I am trying to pull up two molecules in chimera and link them by  
forming a covalent bond between a N and C atom.  I am selecting only  
the N of one molecule and the C of the other.  When I go to command  
line and use the bond sel command I get the following error message.

Type error: Cannot form covalent bond joining two molecules.

Does anyone know how to get around this.

Thanks,
David C.