Using gretna in Matlab to generate FC Matrix

Summary of what happened:

Using gretna in Matlab to generate FC Matrix .

Command used (and if a helper script was used, a link to the helper script or the command generated):

We deal a lot data, but we find some results are zero in all Matrix.
During the processing, there exits some warning :

 In psom_pipeline_process>sub_clean_job (line 797)
  In psom_pipeline_process (line 482)
  In psom_run_pipeline (line 417)
  In gretna_GUI_PreprocessInterface>RunBtn_Callback (line 986)
  In gui_mainfcn (line 95)
  In gretna_GUI_PreprocessInterface (line 42)

I don’t know these warning weather have influenses or not.

Screenshots / relevant information: