diff --git a/star.py b/star.py
index <HASH>..<HASH> 100644
--- a/star.py
+++ b/star.py
@@ -180,6 +180,7 @@ def plot_parameter(logP, parameter, parameter_name, output):
 def trig_param_plot(stars, output):
     logP = numpy.fromiter((math.log(star.period, 10) for star in stars),
                                     numpy.float)
+    assert False, str(stars)
     parameters = numpy.vstack(tuple(
         interpolation.ak_bk2Ak_Phik(star.coefficients) for star in stars))
     (A0, A1, Phi1, A2, Phi2, A3, Phi3) = numpy.hsplit(parameters[:,:7], 7)
Time for more assertion debugging...