@User this can be done, however first i want to solve another issue: For big (hierarchical) designs it is extremely important to save only a subset of nodes to reduce the output data file to a manageable size. I used to do this by placing 'spice_probe' elements attached to the nodes of interest. In HSPICE this used to work also down into the hierarchy. A ".save v(A)" into a subcircuit placed multiple times, say as X1 and X2 had the effect of savig v(X1.A) and v(X2.A). This however does not work in ngspice, so a kind of post processing must be done to flatten the in-subcircuit .SAVE v(node) into a set of global .SAVE v(path.node).