diff --git a/csst/msc/calib_pos.py b/csst/msc/calib_pos.py
index 8265bccbb364068070065dc08fb0961589c69608..94b574a3b89ebdc4f69233b7e51e9d4d0930f099 100644
--- a/csst/msc/calib_pos.py
+++ b/csst/msc/calib_pos.py
@@ -190,7 +190,7 @@ class CsstProcMscPositionCalibration(CsstProcessor):
             filename of the cross matched catalog: ref.cat
         """
         outcat = self.dm.pc_ref_cat
-        fnmae =  cb_fn = self.dm.pc_combined_file("img","fits")
+        fnmae = self.dm.pc_combined_file("img","fits")
         hdu = fits.open(fname)
         header1 = hdu[0].header
         header2 = hdu[1].header
@@ -431,16 +431,16 @@ class CsstProcMscPositionCalibration(CsstProcessor):
     def run(self, img_list, wht_list, flg_list, ccd_ids, path_gaia, search_radius, pm_correct=True, wcs_refine=False, plot=False):
         print('preparing files for position calibration....')
         #self.join_data(img_list, wht_list, flg_list)
-        print('################## run sextractor ###################')
-        p = Pool()
-        prod_x = partial(self.run_sextractor)
-        result = p.map(prod_x, ccd_ids)
-        p.close()
-        p.join()
-        print('################## sextractor done ###################')
-        print('############### combine sextractor catalog ###############')
-        self.combine_catalog(ccd_ids)
-        print('############### get reference catalog ###############3')
+        #print('################## run sextractor ###################')
+        #p = Pool()
+        #prod_x = partial(self.run_sextractor)
+        #result = p.map(prod_x, ccd_ids)
+        #p.close()
+        #p.join()
+        #print('################## sextractor done ###################')
+        #print('############### combine sextractor catalog ###############')
+        #self.combine_catalog(ccd_ids)
+        #print('############### get reference catalog ###############3')
         self.get_refcat(img_list, path_gaia=path_gaia, search_radius=search_radius, silent=True,pm_correct=True)
         print('############### run scamp ##################')
         self.run_scamp(wcs_refine=wcs_refine)