name of Data in obs object changed from MrData to Data

da/ct/optimizer.py

@@ -98,7 +98,7 @@ if __name__ == "__main__":
     dummy = samples.AddSimulations('/Users/peters/tmp/test_da/output/20050305/samples.000.nc')
 
 
-    nobs      = len(samples.MrData)
+    nobs      = len(samples.Data)
     dims      = ( int(DaCycle.da_settings['time.nlag']),
                   int(DaCycle.da_settings['forecast.nmembers']),
                   int(DaCycle.DaSystem.da_settings['nparameters']),