diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index b4ea216..6eecd7a 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1855,7 +1855,7 @@
 			Compute()->cosh()
 
 
-count({comp}, {expr} [, {ic} [, {start}]])			*count()*
+count({comp}, {expr} [, {ic} [, {start}]])		*count()* *E706*
 		Return the number of times an item with value {expr} appears
 		in |String|, |List| or |Dictionary| {comp}.
 
@@ -5052,12 +5052,14 @@
 
 		Can also be used as a |method|: >
 			mylist->insert(item)
-
-instanceof({object}, {class})				*instanceof()*
-		The result is a Number, which is |TRUE| when the {object} argument is a
-		direct or indirect instance of a |Class| specified by {class}.
-		When {class} is a |List| the function returns |TRUE| when {object} is an
-		instance of any of the specified classes.
+<
+					*instanceof()* *E614* *E616* *E693*
+instanceof({object}, {class})
+		The result is a Number, which is |TRUE| when the {object}
+		argument is a direct or indirect instance of a |Class|
+		specified by {class}.
+		When {class} is a |List| the function returns |TRUE| when
+		{object} is an instance of any of the specified classes.
 		Example: >
 			instanceof(animal, [Dog, Cat])
 
@@ -6689,6 +6691,7 @@
 		using a {n$} positional argument specifier. See |printf-$|.
 
 
+							*E1520*
 		The conversion specifiers and their meanings are:
 
 				*printf-d* *printf-b* *printf-B* *printf-o*
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index 41b7d56..e7152bb 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -3128,6 +3128,10 @@
 <			You may want to make a copy of a list to avoid this.
 			See |deepcopy()|.
 
+							*E1391* *E1392*
+			Locking and unlocking object and class variables is
+			currently NOT supported.
+
 
 :unlo[ckvar][!] [depth] {name} ...		*:unlockvar* *:unlo* *E1246*
 			Unlock the internal variable {name}.  Does the
diff --git a/runtime/doc/tags b/runtime/doc/tags
index a275352..f4617e8 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -4489,6 +4489,8 @@
 E1389	vim9class.txt	/*E1389*
 E139	message.txt	/*E139*
 E1390	vim9class.txt	/*E1390*
+E1391	eval.txt	/*E1391*
+E1392	eval.txt	/*E1392*
 E140	message.txt	/*E140*
 E141	message.txt	/*E141*
 E142	message.txt	/*E142*
@@ -4513,6 +4515,7 @@
 E1509	editing.txt	/*E1509*
 E151	helphelp.txt	/*E151*
 E152	helphelp.txt	/*E152*
+E1520	builtin.txt	/*E1520*
 E153	helphelp.txt	/*E153*
 E154	helphelp.txt	/*E154*
 E155	sign.txt	/*E155*
@@ -5007,6 +5010,8 @@
 E611	eval.txt	/*E611*
 E612	sign.txt	/*E612*
 E613	print.txt	/*E613*
+E614	builtin.txt	/*E614*
+E616	builtin.txt	/*E616*
 E617	options.txt	/*E617*
 E618	print.txt	/*E618*
 E619	print.txt	/*E619*
@@ -5090,6 +5095,7 @@
 E690	eval.txt	/*E690*
 E691	eval.txt	/*E691*
 E692	eval.txt	/*E692*
+E693	builtin.txt	/*E693*
 E694	eval.txt	/*E694*
 E695	eval.txt	/*E695*
 E696	eval.txt	/*E696*
@@ -5103,6 +5109,7 @@
 E703	eval.txt	/*E703*
 E704	eval.txt	/*E704*
 E705	eval.txt	/*E705*
+E706	builtin.txt	/*E706*
 E707	eval.txt	/*E707*
 E708	eval.txt	/*E708*
 E709	eval.txt	/*E709*