Error and warning messages

src/jam

@@ -40,6 +40,10 @@ def read_cli():
                 # lattice
                 if c=='L':
                     flag="lattice"
+                else:
+                    print("error: unrecognized option '"+c+"'\n", file=sys.stderr)
+                    exit()
+
 
         else:
             # read lattice argument

src/painter.py

@@ -533,6 +533,8 @@ class Painter(Widget):
                         self.set_color((float(color_str[0]),float(color_str[1]),float(color_str[2])))
                     except:
                         print("warning: ignoring line "+str(i)+" in file '"+file+"': color '"+color_str+"' cannot be read",file=sys.stderr)
+                else:
+                    print("warning: ignoring line "+str(i)+" in file '"+file+"': unrecognized option '"+key+"'",file=sys.stderr)
                 continue
 
             entries=line.split(";")