diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index 47b1aa766cef4deaea9b9e720ad89d8552a0aeb7..fe89ccd0d26d0b9b57b35548515314fd42f8c6ac 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1721,9 +1721,9 @@ class MCIsimulator():
              
         self.log.info('Stat catlog file name is %s' % (starcat))
         
-        #df0=pandas.read_csv(self.information['dir_path']+'MCI_inputData/star_input/'+starcat)   
+        da=fits.open(self.information['dir_path']+'MCI_inputData/star_input/'+starcat)   
         
-        da=fits.open(starcat)
+        ####da=fits.open(starcat)
         
         df2=da[1].data
         ####