I have installed ngspice 19 in fedora core 9.but when i run one of the examples given namely inverter2.sp i get some warnings in the .measure statements. for eg for the statement - ".measure tran v0_avg avg i(v0) from='dfall' to='dfall+period' " i get warnings saying "can't parse from='dfall'; ignored" and the same for to='dfall+period'. also for the statement ".measure tran inv_delay trig v(in) val='vp/2' fall=1 targ v(out) val='vp/2' rise=1" i get the same warning for val , fall, targ & rise. all r ignored and i also get their values in o/p file.

can anybody tell me how to avoid these warnings..

also for the statement ".measure tran v0_avg avg i(v0) from='dfall' to='dfall+period' " we get the avg value for the voltage source. can anybody tell me how to find the avg power? is there any other vector type that can be used instead of i(v0)?