**BUG** Concise problem statement: Running a tran sim works with this spice directive: `let Icoll = -I(VCC)` `probe Icoll` set as text type = spice but running a DC Sweep sim says: "Error(parse.c--checkvalid): icoll: no such vector." Steps to reproduce bug: 1. Set this text: `let Icoll = -I(VCC)` `probe Icoll` to be an active spice directive (text type = spice) 2. CTRL+R (with `dc I1 0 20m 20u` set as spice directive) Results: Simulation results shows: "Error(parse.c--checkvalid): icoll: no such vector." Expected results: Sim should run showing i(VCC) as well as i(i(XVA1)) the same way it does when running a tran sim. Url: https://easyeda.com/editor#id=8ysKEWewO Browser:Mozilla/5.0 (Windows NT 5.1; rv:27.0) Gecko/20100101 Firefox/27.0