Index: trunk/doc/tutorial/simulation/raw/gnucap/06_passive_ac.rs
===================================================================
--- trunk/doc/tutorial/simulation/raw/gnucap/06_passive_ac.rs	(revision 8651)
+++ trunk/doc/tutorial/simulation/raw/gnucap/06_passive_ac.rs	(revision 8652)
@@ -483,6 +483,7 @@
 					-sym-source=sch-rnd default symbol lib
 					role=symbol
 					spice/command={print ac vdb(out) zp(out)
+op
 ac dec 10 1 1000k > plot.txt
 }
 				}
Index: trunk/doc/tutorial/simulation/raw/gnucap/12_bjt_amp_ac.rs
===================================================================
--- trunk/doc/tutorial/simulation/raw/gnucap/12_bjt_amp_ac.rs	(revision 8651)
+++ trunk/doc/tutorial/simulation/raw/gnucap/12_bjt_amp_ac.rs	(revision 8652)
@@ -896,6 +896,7 @@
 					-sym-source=sch-rnd default symbol lib
 					role=symbol
 					spice/command={print ac vdb(out) zp(out)
+op
 ac dec 10 1 1000k > plot.txt
 }
 				}
Index: trunk/doc/tutorial/simulation/raw/gnucap/18_opamp_ac.rs
===================================================================
--- trunk/doc/tutorial/simulation/raw/gnucap/18_opamp_ac.rs	(revision 8651)
+++ trunk/doc/tutorial/simulation/raw/gnucap/18_opamp_ac.rs	(revision 8652)
@@ -687,6 +687,7 @@
 					-sym-source=sch-rnd default symbol lib
 					role=symbol
 					spice/command={print ac vdb(out) zp(out)
+op
 ac dec 10 1 1000k > plot.txt}
 				}
 			}