Give a better diagnostic when the flux table is not read correctly.

CHANGELOG.md

@@ -25,6 +25,7 @@
 - When using the `parameters\_file` option, the indices of the models now correspond to the line number of the input file. (Médéric Boquien)
 - When using the `parameters\_file` option, the list of modules is read from `sed\_modules` rather than being inferred from the input file. (Médéric Boquien)
 - The computation of the upper limits would only work for the first few models, reverting back to regular fits for the others. (Médéric Boquien)
+- A more explicit message is now given when the flux table cannot be read properly. (Médéric Boquien)
 
 ### Optimised
 - The cache architecture has been simplified, making it somewhat faster. It speeds up the model generation by ~1%. (Médéric Boquien)

pcigale/session/configuration.py

@@ -137,8 +137,12 @@ class Configuration(object):
         if self.config['data_file'] != '':
             obs_table = read_table(self.config['data_file'])
 
-            # Check that the id and redshift columns are present in the input
-            # file
+            # Check that the the file was correctly read and that the id and
+            # redshift columns are present in the input file
+            if 'col1' in obs_table.columns:
+                raise Exception("The input could not be read properly. Verify "
+                                "its format and that it does not have two "
+                                "columns with the same name.")
             if 'id' not in obs_table.columns:
                 raise Exception("Column id not present in input file")
             if 'redshift' not in obs_table.columns: