importing io4 instead of io, added the optimizer diagnostics to the OutputFileList for collection

da/baseclasses/optimizer.py

@@ -166,11 +166,12 @@ class Optimizer(object):
 
             The type designation refers to the writing of prior or posterior data and is used in naming the variables"
         """
-        #import da.tools.io4 as io
-        import da.tools.io as io
+        import da.tools.io4 as io
+        #import da.tools.io as io
 
         outdir          = DaCycle['dir.diagnostics']
         filename        = os.path.join(outdir,'optimizer.%s.nc'% DaCycle['time.start'].strftime('%Y%m%d') )
+        DaCycle.OutputFileList.extend( filename )
 
         # Open or create file