diff --git a/SAGA/objects/build2.py b/SAGA/objects/build2.py
index 796183e..4e5e311 100644
--- a/SAGA/objects/build2.py
+++ b/SAGA/objects/build2.py
@@ -562,6 +562,13 @@ def remove_shreds_near_spec_obj(base, nsa=None):
     return base
 
 
+def remove_too_close_to_host(base):
+    min_rhost = base['RHOST_KPC'].min()
+    q = Query((lambda r: ((r < 10.0) & (r > min_rhost)), 'RHOST_KPC'))
+    base['REMOVE'][q.mask(base)] += (1 << 30)
+    return base
+
+
 def add_surface_brightness(base):
     base['sb_r'] = base['r_mag'] + 2.5 * np.log10(np.maximum(2.0*np.pi*base['radius']**2.0, 1.0e-40))
     return base
@@ -586,7 +593,10 @@ def build_full_stack(host, sdss=None, des=None, decals=None, nsa=None,
     all_spectra = []
 
     if sdss is not None:
-        all_spectra.append(extract_sdss_spectra(sdss))
+        sdss_specs = extract_sdss_spectra(sdss)
+        if sdss_specs is not None:
+            all_spectra.append(sdss_specs)
+        del sdss_specs
         sdss = prepare_sdss_catalog_for_merging(sdss, sdss_remove, sdss_recover)
 
     if des is not None:
@@ -622,7 +632,7 @@ def build_full_stack(host, sdss=None, des=None, decals=None, nsa=None,
         base = remove_shreds_near_spec_obj(base, nsa)
         del nsa
 
-    base['REMOVE'][Query('RHOST_KPC < 10.0').mask(base)] += (1 << 30)
+    base = remove_too_close_to_host(base)
     base = add_surface_brightness(base)
     base = build.find_satellites(base, version=2)
     base = build.add_stellar_mass(base)
diff --git a/SAGA/objects/object_catalog.py b/SAGA/objects/object_catalog.py
index 6b730e6..20f439c 100644
--- a/SAGA/objects/object_catalog.py
+++ b/SAGA/objects/object_catalog.py
@@ -1,4 +1,5 @@
 import time
+import traceback
 import numpy as np
 from astropy.table import vstack
 from easyquery import Query
@@ -337,10 +338,11 @@ def get_catalog_or_none(catalog_name):
                 base = build_module.build_full_stack(host=host, nsa=nsa, spectra=spectra, debug=debug_this,
                                                      **manual_lists, **catalog_dict)
             except Exception as e: # pylint: disable=W0703
-                print(time.strftime('[%m/%d %H:%M:%S]'), '[ERROR] Fail to build base catalog for {}\n{}'.format(host_id, e))
+                print(time.strftime('[%m/%d %H:%M:%S]'), '[ERROR] Fail to build base catalog for {}'.format(host_id))
                 base = None
                 if raise_exception:
                     raise e
+                traceback.print_exc()
                 continue
             finally:
                 del catalog_dict
@@ -351,7 +353,10 @@ def get_catalog_or_none(catalog_name):
             try:
                 data_obj.write(base)
             except (IOError, OSError) as e:
-                print(time.strftime('[%m/%d %H:%M:%S]'), '[ERROR] Fail to write base catalog for {}\n{}'.format(host_id, e))
+                print(time.strftime('[%m/%d %H:%M:%S]'), '[ERROR] Fail to write base catalog for {}'.format(host_id))
+                if raise_exception:
+                    raise e
+                traceback.print_exc()
                 continue
 
         if return_catalogs:
diff --git a/SAGA/spectra/extract_exsiting.py b/SAGA/spectra/extract_exsiting.py
index 5808a60..ba071d9 100644
--- a/SAGA/spectra/extract_exsiting.py
+++ b/SAGA/spectra/extract_exsiting.py
@@ -7,6 +7,8 @@
 
 def extract_sdss_spectra(sdss):
     specs = Query('SPEC_Z > -1.0').filter(sdss['RA', 'DEC', 'SPEC_Z', 'SPEC_Z_ERR', 'SPEC_Z_WARN', 'OBJID'])
+    if not len(specs):
+        return
     specs['ZQUALITY'] = np.where(specs['SPEC_Z_WARN'] == 0, 4, 1)
     del specs['SPEC_Z_WARN']
     specs.rename_column('OBJID', 'SPECOBJID')
diff --git a/SAGA/version.py b/SAGA/version.py
index 4c53590..a551053 100644
--- a/SAGA/version.py
+++ b/SAGA/version.py
@@ -1,4 +1,4 @@
 """
 SAGA package version
 """
-__version__ = '0.8.0'
+__version__ = '0.8.1'