diff --git a/csst/msc/pipeline.py b/csst/msc/pipeline.py
index d19dd8ae1eecae8bbefb46d4832a9ea096f3f40a..9a64e462e2daff5baa66c58c9d77e313ca763e04 100644
--- a/csst/msc/pipeline.py
+++ b/csst/msc/pipeline.py
@@ -69,41 +69,41 @@ def do_one_exposure(ver_sim="C5.1", dir_l0="", dir_l1="", dir_pcref="", path_aux
     # Step 1. Correct instrumental effect
     os.chdir(dir_l1)
 
-    img_list = []
-    wht_list = []
-    flg_list = []
-    fn_list = []
-    for this_ccd_id in ccd_ids:
-        print("processing CCD {}".format(this_ccd_id))
-        fp_raw = dm.l0_sci(ccd_id=this_ccd_id)
-
-        # read data with CsstMscImgData.read
-        raw = CsstMscImgData.read(fp_raw)
-
-        # in the future, use get_* functions grab
-        bias = dm.get_bias(this_ccd_id)
-        dark = dm.get_dark(this_ccd_id)
-        flat = dm.get_flat(this_ccd_id)
-
-        # initialize Instrument Processor
-        instProc = CsstMscInstrumentProc()
-        instProc.prepare(n_jobs=n_jobs)
-        img, wht, flg = instProc.run(raw, bias, dark, flat, ver_sim)
-        instProc.cleanup()
-        fp_img = img[0].header["FILENAME"] + '.fits'
-
-        # save img, wht, flg to somewhere
-        img.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="img", ext="fits"), overwrite=True)
-        wht.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="wht", ext="fits"), overwrite=True)
-        flg.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="flg", ext="fits"), overwrite=True)
-        # save header
-        img[1].header.tofile(dm.l1_sci(ccd_id=this_ccd_id, suffix="img", ext="head"), overwrite=True)
-
-        # append img, wht, flg list
-        img_list.append(img)
-        wht_list.append(wht)
-        flg_list.append(flg)
-        fn_list.append(fp_img)
+    #img_list = []
+    #wht_list = []
+    #flg_list = []
+    #fn_list = []
+    #for this_ccd_id in ccd_ids:
+    #    print("processing CCD {}".format(this_ccd_id))
+    #    fp_raw = dm.l0_sci(ccd_id=this_ccd_id)
+
+    #    # read data with CsstMscImgData.read
+    #    raw = CsstMscImgData.read(fp_raw)
+
+    #    # in the future, use get_* functions grab
+    #    bias = dm.get_bias(this_ccd_id)
+    #    dark = dm.get_dark(this_ccd_id)
+    #    flat = dm.get_flat(this_ccd_id)
+
+    #    # initialize Instrument Processor
+    #    instProc = CsstMscInstrumentProc()
+    #    instProc.prepare(n_jobs=n_jobs)
+    #    img, wht, flg = instProc.run(raw, bias, dark, flat, ver_sim)
+    #    instProc.cleanup()
+    #    fp_img = img[0].header["FILENAME"] + '.fits'
+
+    #    # save img, wht, flg to somewhere
+    #    img.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="img", ext="fits"), overwrite=True)
+    #    wht.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="wht", ext="fits"), overwrite=True)
+    #    flg.writeto(dm.l1_sci(ccd_id=this_ccd_id, suffix="flg", ext="fits"), overwrite=True)
+    #    # save header
+    #    img[1].header.tofile(dm.l1_sci(ccd_id=this_ccd_id, suffix="img", ext="head"), overwrite=True)
+
+    #    # append img, wht, flg list
+    #    img_list.append(img)
+    #    wht_list.append(wht)
+    #    flg_list.append(flg)
+    #    fn_list.append(fp_img)
 
     # Step 2. Calibrate Position
     pcProc = CsstProcMscPositionCalibration()