diff --git a/src/vim9execute.c b/src/vim9execute.c
index c5dc30d..19f5bdc 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -1510,6 +1510,13 @@
 	    emsg(_(e_script_variable_type_changed));
 	return NULL;
     }
+
+    if (!sv->sv_export && sref->sref_sid != current_sctx.sc_sid)
+    {
+	if (dfunc != NULL)
+	    semsg(_(e_item_not_exported_in_script_str), sv->sv_name);
+	return NULL;
+    }
     return sv;
 }
 
@@ -2623,6 +2630,20 @@
 		}
 		break;
 
+	    case ISN_SOURCE:
+		{
+		    scriptitem_T *si = SCRIPT_ITEM(iptr->isn_arg.number);
+
+		    if (si->sn_state == SN_STATE_NOT_LOADED)
+		    {
+			SOURCING_LNUM = iptr->isn_lnum;
+			if (do_source(si->sn_name, FALSE, DOSO_NONE, NULL)
+								       == FAIL)
+			    goto on_error;
+		    }
+		}
+		break;
+
 	    // execute :substitute with an expression
 	    case ISN_SUBSTITUTE:
 		{
@@ -2902,11 +2923,12 @@
 		}
 		break;
 
-	    // load s: variable in old script
+	    // load s: variable in old script or autoload import
 	    case ISN_LOADS:
+	    case ISN_LOADEXPORT:
 		{
-		    hashtab_T	*ht = &SCRIPT_VARS(
-					       iptr->isn_arg.loadstore.ls_sid);
+		    int		sid = iptr->isn_arg.loadstore.ls_sid;
+		    hashtab_T	*ht = &SCRIPT_VARS(sid);
 		    char_u	*name = iptr->isn_arg.loadstore.ls_name;
 		    dictitem_T	*di = find_var_in_ht(ht, 0, name, TRUE);
 
@@ -2918,6 +2940,25 @@
 		    }
 		    else
 		    {
+			if (iptr->isn_type == ISN_LOADEXPORT)
+			{
+			    int idx = get_script_item_idx(sid, name, 0,
+								   NULL, NULL);
+			    svar_T	*sv;
+
+			    if (idx >= 0)
+			    {
+				sv = ((svar_T *)SCRIPT_ITEM(sid)
+						  ->sn_var_vals.ga_data) + idx;
+				if (!sv->sv_export)
+				{
+				    SOURCING_LNUM = iptr->isn_lnum;
+				    semsg(_(e_item_not_exported_in_script_str),
+									 name);
+				    goto on_error;
+				}
+			    }
+			}
 			if (GA_GROW_FAILS(&ectx->ec_stack, 1))
 			    goto theend;
 			copy_tv(&di->di_tv, STACK_TV_BOT(0));
@@ -3039,20 +3080,48 @@
 		*tv = *STACK_TV_BOT(0);
 		break;
 
-	    // store s: variable in old script
+	    // store s: variable in old script or autoload import
 	    case ISN_STORES:
+	    case ISN_STOREEXPORT:
 		{
-		    hashtab_T	*ht = &SCRIPT_VARS(
-					       iptr->isn_arg.loadstore.ls_sid);
+		    int		sid = iptr->isn_arg.loadstore.ls_sid;
+		    hashtab_T	*ht = &SCRIPT_VARS(sid);
 		    char_u	*name = iptr->isn_arg.loadstore.ls_name;
-		    dictitem_T	*di = find_var_in_ht(ht, 0, name + 2, TRUE);
+		    dictitem_T	*di = find_var_in_ht(ht, 0,
+					    iptr->isn_type == ISN_STORES
+						     ? name + 2 : name, TRUE);
 
 		    --ectx->ec_stack.ga_len;
+		    SOURCING_LNUM = iptr->isn_lnum;
 		    if (di == NULL)
+		    {
+			if (iptr->isn_type == ISN_STOREEXPORT)
+			{
+			    semsg(_(e_undefined_variable_str), name);
+			    goto on_error;
+			}
 			store_var(name, STACK_TV_BOT(0));
+		    }
 		    else
 		    {
-			SOURCING_LNUM = iptr->isn_lnum;
+			if (iptr->isn_type == ISN_STOREEXPORT)
+			{
+			    int idx = get_script_item_idx(sid, name, 0,
+								   NULL, NULL);
+
+			    if (idx >= 0)
+			    {
+				svar_T	*sv = ((svar_T *)SCRIPT_ITEM(sid)
+						  ->sn_var_vals.ga_data) + idx;
+
+				if (!sv->sv_export)
+				{
+				    semsg(_(e_item_not_exported_in_script_str),
+									 name);
+				    goto on_error;
+				}
+			    }
+			}
 			if (var_check_permission(di, name) == FAIL)
 			{
 			    clear_tv(STACK_TV_BOT(0));
@@ -5409,11 +5478,15 @@
 #endif
 		break;
 	    case ISN_INSTR:
+		smsg("%s%4d INSTR", pfx, current);
+		list_instructions("    ", iptr->isn_arg.instr, INT_MAX, NULL);
+		msg("     -------------");
+		break;
+	    case ISN_SOURCE:
 		{
-		    smsg("%s%4d INSTR", pfx, current);
-		    list_instructions("    ", iptr->isn_arg.instr,
-								INT_MAX, NULL);
-		    msg("     -------------");
+		    scriptitem_T    *si = SCRIPT_ITEM(iptr->isn_arg.number);
+
+		    smsg("%s%4d SOURCE %s", pfx, current, si->sn_name);
 		}
 		break;
 	    case ISN_SUBSTITUTE:
@@ -5500,12 +5573,15 @@
 		}
 		break;
 	    case ISN_LOADS:
+	    case ISN_LOADEXPORT:
 		{
 		    scriptitem_T *si = SCRIPT_ITEM(
 					       iptr->isn_arg.loadstore.ls_sid);
 
-		    smsg("%s%4d LOADS s:%s from %s", pfx, current,
-				 iptr->isn_arg.loadstore.ls_name, si->sn_name);
+		    smsg("%s%4d %s s:%s from %s", pfx, current,
+			    iptr->isn_type == ISN_LOADS ? "LOADS"
+								: "LOADEXPORT",
+			    iptr->isn_arg.loadstore.ls_name, si->sn_name);
 		}
 		break;
 	    case ISN_LOADAUTO:
@@ -5586,11 +5662,14 @@
 		smsg("%s%4d STORET %s", pfx, current, iptr->isn_arg.string);
 		break;
 	    case ISN_STORES:
+	    case ISN_STOREEXPORT:
 		{
 		    scriptitem_T *si = SCRIPT_ITEM(
 					       iptr->isn_arg.loadstore.ls_sid);
 
-		    smsg("%s%4d STORES %s in %s", pfx, current,
+		    smsg("%s%4d %s %s in %s", pfx, current,
+				iptr->isn_type == ISN_STORES
+						    ? "STORES" : "STOREEXPORT",
 				 iptr->isn_arg.loadstore.ls_name, si->sn_name);
 		}
 		break;