diff --git a/openghg_inversions/hbmcmc/inversion_pymc.py b/openghg_inversions/hbmcmc/inversion_pymc.py
index ca5aacf..7e8f580 100644
--- a/openghg_inversions/hbmcmc/inversion_pymc.py
+++ b/openghg_inversions/hbmcmc/inversion_pymc.py
@@ -531,7 +531,7 @@ def inferpymc_postprocessouts(
       obs_repeatability: 
         Instrument error
       obs_variability: 
-        XXXX
+        Error from resampling observations
       fp_data:
         Output from footprints_data_merge + sensitivies
       country_file: