diff --git a/interpol_param.pro b/interpol_param.pro
index e080abb4a93a18990425c186c3aa7036d1189040..e8da3f31181e27949d7a0071772c3356edea817a 100644
--- a/interpol_param.pro
+++ b/interpol_param.pro
@@ -26,7 +26,7 @@ function interpol_param, table, par_name, date, empty_params = empty_params
 	if jul_date ge min(par_date) and jul_date le max(par_date) then value = interpol(float(par_val), par_date, jul_date) else begin
 		journal, 'Error 02: insufficient number of parameter values in house-keeping table.'
 		journal
-		exit, status = 1
+		exit, status = 2
 	endelse
 	if finite(value) then return, value else begin
 	  	journal, 'Error 03: interpolation of HK parameter ' + par_name.trim() + ' failed.'