Capture possible error occuring due to to incomplete dictonaries.

pylot/core/io/phases.py

@@ -886,7 +886,6 @@ def writephases(arrivals, fformat, filename, parameter=None, eventinfo=None):
         try:
             eventsource = eventinfo.origins[0]
         except:
-            print("No source origin given! Locate event first!")
             print("No source origin calculated yet, thus no cnv-file creation possible!")
             return
         eventsource = eventinfo.origins[0]

pylot/core/pick/compare.py

@@ -123,8 +123,11 @@ class Comparison(object):
                 compare_pdf = dict()
                 for phase in phases:
                     if phase in pdf_b[station].keys():
+                        try:
                             compare_pdf[phase] = phases[phase] - pdf_b[station][
                                 phase]
+                        except:
+                            compare_pdf = None
                 if compare_pdf is not None:
                     compare_pdfs[station] = compare_pdf