diff --git a/openghg_inversions/filters.py b/openghg_inversions/filters.py
index 0890862..9f2d621 100644
--- a/openghg_inversions/filters.py
+++ b/openghg_inversions/filters.py
@@ -423,7 +423,7 @@ def pblh_inlet_diff(
     filt = pblh_da > inlet_height + diff_threshold
     drop = not keep_missing
 
-    return dataset.where(filt, drop=drop)
+    return dataset.where(filt.compute(), drop=drop)
 
 
 @register_filter
diff --git a/openghg_inversions/get_data.py b/openghg_inversions/get_data.py
index 3124104..0aae21d 100644
--- a/openghg_inversions/get_data.py
+++ b/openghg_inversions/get_data.py
@@ -321,6 +321,8 @@ def data_processing_surface_notracer(
                 store=footprint_store,
                 species=fp_species,
             )
+            if get_fps.data.time.size==0:
+                raise SearchError
         except SearchError:
             print(
                 f"\nNo footprint data found for {site} with inlet/height {fp_height[i]}, model {fp_model}, and domain {domain}.",
diff --git a/openghg_inversions/hbmcmc/run_hbmcmc.py b/openghg_inversions/hbmcmc/run_hbmcmc.py
index b62d0da..3105db8 100644
--- a/openghg_inversions/hbmcmc/run_hbmcmc.py
+++ b/openghg_inversions/hbmcmc/run_hbmcmc.py
@@ -25,6 +25,7 @@
 import json
 import sys
 import argparse
+from pathlib import Path
 from shutil import copyfile
 from collections.abc import Callable
 
@@ -191,7 +192,7 @@ def hbmcmc_extract_param(
 
     args = parser.parse_args()
 
-    config_file = args.config
+    config_file = Path(args.config)
     command_line_args = {}
     if args.start:
         command_line_args["start_date"] = args.start