diff --git a/cscripts/cscaldb.py b/cscripts/cscaldb.py
index d43f342..7b61a27 100755
--- a/cscripts/cscaldb.py
+++ b/cscripts/cscaldb.py
@@ -121,7 +121,7 @@ class cscaldb(ctools.cscript):
 
         # Extract response names from calibrations and append them to the
         # response name list
-        nrows = calibrations.length()
+        nrows = calibrations.nrows()
         ncols = calibrations.number()
         for row in range(nrows):
             for col in range(ncols):
diff --git a/cscripts/csiactcopy.py b/cscripts/csiactcopy.py
index fe11a3f..05bd4f7 100755
--- a/cscripts/csiactcopy.py
+++ b/cscripts/csiactcopy.py
@@ -239,7 +239,7 @@ class csiactcopy(ctools.cscript):
                 
                 # Loop over rows and columns to copy over values exteding remote HDU
                 for col in tmp_hdu:
-                    for row in range(col.length()):
+                    for row in range(col.nrows()):
                         remote_hdu[col.name()][size + row] = col[row]
 
         # Get remote obs_id
@@ -329,7 +329,7 @@ class csiactcopy(ctools.cscript):
             remote_col = remote_hdu[i]    
             
             # Loop over entries and merge
-            for j in range(remote_col.length()):
+            for j in range(remote_col.nrows()):
                 local_col[j+old_local_rows] = remote_col[j]
         
         # Save local fits file