diff --git a/mod.lua b/mod.lua
index f89c9bd..f545ee2 100644
--- a/mod.lua
+++ b/mod.lua
@@ -55,6 +55,7 @@ function configuration(modname)
 	modname = modname or minetest.get_current_modname()
 	local schema = modlib.schema.new(assert(include(modname, "schema.lua")))
 	schema.name = schema.name or modname
+	local settingtypes = schema:generate_settingtypes()
 	assert(schema.type == "table")
 	local overrides = {}
 	local conf
@@ -105,7 +106,7 @@ function configuration(modname)
 		overrides = modlib.table.deep_add_all(overrides, minetest_conf)
 		conf = schema:load(overrides, {convert_strings = true, error_message = true})
 	end
-	modlib.file.ensure_content(get_resource(modname, "settingtypes.txt"), schema:generate_settingtypes())
+	modlib.file.ensure_content(get_resource(modname, "settingtypes.txt"), settingtypes)
 	local readme_path = get_resource(modname, "Readme.md")
 	local readme = modlib.file.read(readme_path)
 	if readme then
diff --git a/schema.lua b/schema.lua
index d1b691b..31081a2 100644
--- a/schema.lua
+++ b/schema.lua
@@ -196,7 +196,7 @@ function load(self, override, params)
 			push(">=", "min")
 			push("<", "max_exclusive")
 			push("<=", "max")
-			return "out of range: expected value " .. table.concat(conditions, "and")
+			return "out of range: expected value" .. table.concat(conditions, " and")
 		end
 		if typ == "int" then
 			return "expected integer"
@@ -226,8 +226,7 @@ function load(self, override, params)
 	local function error(type, ...)
 		if params.error_message then
 			local formatted = format_error(type, ...)
-			settingtypes(self)
-			_error("Invalid value: " .. self.name .. ": " .. formatted)
+			_error("Invalid value: " .. (self.name and (self.name .. ": ") or "") .. formatted)
 		end
 		_error{
 			type = type,