diff --git a/csst/msc/calib_pos.py b/csst/msc/calib_pos.py
index cddab1017638c7cf94bdbc55856f97a47833615f..c8c885bb6746db527e9e51e820667bd7c591b4ef 100644
--- a/csst/msc/calib_pos.py
+++ b/csst/msc/calib_pos.py
@@ -66,7 +66,7 @@ class CsstProcMscPositionCalibration(CsstProcessor):
             hdul_flg.append(h1)
         hdul_flg.writeto(output_flgnm, overwrite=True)
 
-    def run_sextractor(self,ccd_ids):
+    def run_sextractor(self, ccd_ids):
         """
         Run sextractor
 
@@ -81,19 +81,19 @@ class CsstProcMscPositionCalibration(CsstProcessor):
         cat_list = []
         fn_list = []
         for this_ccd_id in ccd_ids:
+            print("good")
             sex_cat = self.dm.l1_sci(ccd_id = this_ccd_id, suffix="img", ext="cat")
             fn = self.dm.l1_sci(ccd_id=this_ccd_id, suffix="img", ext="fits")
             cat_list.append(sex_cat)
-            fn_list.append(fn)
         
-        config_sextractor = CONFIG_PATH + "new_csst_realtime.no.weight.sex"
-        sex_comd1 = 'sex -c ' + config_sextractor + ' '
-        sex_comd2 = fn_list + ' -CATALOG_NAME ' + cat_list
-        sex_comd3 = ' -PARAMETERS_NAME ' + CONFIG_PATH + 'csst_realtime.param' + ' -FILTER_NAME ' + CONFIG_PATH + 'csst_realtime.conv' + ' -STARNNW_NAME ' + CONFIG_PATH + 'csst_realtime.nnw'
-        sex_comd = sex_comd1 + sex_comd2 + sex_comd3
-        print(sex_comd)
-        p = Popen(sex_comd, shell=True)
-        p.wait()
+       # config_sextractor = CONFIG_PATH + "new_csst_realtime.no.weight.sex"
+       # sex_comd1 = 'sex -c ' + config_sextractor + ' '
+       # sex_comd2 = fn_list + ' -CATALOG_NAME ' + cat_list
+       # sex_comd3 = ' -PARAMETERS_NAME ' + CONFIG_PATH + 'csst_realtime.param' + ' -FILTER_NAME ' + CONFIG_PATH + 'csst_realtime.conv' + ' -STARNNW_NAME ' + CONFIG_PATH + 'csst_realtime.nnw'
+       # sex_comd = sex_comd1 + sex_comd2 + sex_comd3
+       # print(sex_comd)
+       # p = Popen(sex_comd, shell=True)
+       # p.wait()
 
     def combine_catalog(self, ccd_ids):
         """
@@ -332,14 +332,14 @@ class CsstProcMscPositionCalibration(CsstProcessor):
         scat = fits.open(fn_scat)
         hdul = fits.HDUList()
         for i in range(0, len(img_list)):
-            wcshdr = fits.getheader(wcshead, i, ignore_missing_simple=True)  # read headers and change to RA---TPV,DEC--TPV for wcs_transfer package
+            wcshdr = fits.getheader(wcshead, i, ignore_missing_simple=True)       
             wcshdr['CTYPE1'] = 'RA---TPV'
             wcshdr['CTYPE2'] = 'DEC--TPV'
             w = WCS(wcshdr)
             sexcat = data_scat[i*3+2].data
             x = sexcat['XWIN_IMAGE']
             y = sexcat['YWIN_IMAGE']
-            r, d = w.all_pix2world(x, y, 0)  # convert xwin,ywin to ra,de
+            r, d = w.all_pix2world(x, y, 0)  
             sexcat['ALPHA_J2000'] = r
             sexcat['DELTA_J2000'] = d
             r1 = np.hstack((r1, r))
@@ -436,13 +436,14 @@ 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)
+        #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()
+        #p = Pool()
+        #prod_x = partial(self.run_sextractor)
+        #result = p.map(prod_x, fn_list)
+        #p.close()
+        #p.join()
+        self.run_sextractor(ccd_ids)
         print('################## sextractor done ###################')
         print('############### combine sextractor catalog ###############')
         self.combine_catalog(ccd_ids)