Error: vector V(/vbuf_com) not found!

Hi all.

Im simulating a circuit in Eeschema and sometimes there are nodes that were not saved in the current simulation even if they appear in the list.

Once I try to plot one of these, a message appears:

Error: vector V(/vbuf_com) not found!

I would like to know how can I set the Ngspice to plot all nodes. It also appears that the dangling nodes are not saved. Could it depends on the size of the circuit?

Thanks and best regards

Could you supply (upload) a small example which does show this problem?