diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d384448..6322099f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,8 +3,12 @@
 - New check DocCommentStyle [#440](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/440)
 - New check FieldDocComment [#442](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/442)
 - New check TypeDocComment [#440](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/440)
+- Added relaxed mode to ConfigParser, fixes [#441](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/441) ([#443](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/443))
 - Fixed handling of comments between types in ExtendedEmptyLines [#440](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/440)
 - Fixed unittest and coverage reporting for Haxe 4 [#442](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/442)
+- Fixed indentation calculation for functions bodys without curly braces [#443](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/443)
+- Fixed segmentaion faults in NeedBraces and CatchParameterName checks [#443](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/443)
+- Changed message of NestedForLoop check [#443](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/443)
 - Refactored `Checker.getLinePos` to use binary search, reduces runtime from O(N/2) to O(log N) [#439](https://github.com/HaxeCheckstyle/haxe-checkstyle/issues/439)
 
 ## version 2.4.1 (2018-06-14)
diff --git a/src/checkstyle/Main.hx b/src/checkstyle/Main.hx
index 1e1300ce..b5923a4d 100644
--- a/src/checkstyle/Main.hx
+++ b/src/checkstyle/Main.hx
@@ -94,6 +94,7 @@ class Main {
 				}
 			}
 			else configParser.paths.push("/code");
+			configParser.validateMode = RELAXED;
 
 			if (defaultConfig.config != null) configPath = defaultConfig.config;
 			if (defaultConfig.exclude != null) excludePath = defaultConfig.exclude;
diff --git a/src/checkstyle/checks/block/NeedBracesCheck.hx b/src/checkstyle/checks/block/NeedBracesCheck.hx
index f7d5bac6..d6d9a9f0 100644
--- a/src/checkstyle/checks/block/NeedBracesCheck.hx
+++ b/src/checkstyle/checks/block/NeedBracesCheck.hx
@@ -61,6 +61,7 @@ class NeedBracesCheck extends Check {
 					checkIfChild(tok);
 				case Kwd(KwdElse):
 					var firstChild = tok.getFirstChild();
+					if (firstChild == null) continue;
 					if (firstChild.is(Kwd(KwdIf))) checkIfChild(firstChild);
 					else checkLastChild(tok);
 				case Kwd(KwdFunction):
@@ -147,6 +148,7 @@ class NeedBracesCheck extends Check {
 	}
 
 	function checkNoBraces(parent:TokenTree, child:TokenTree) {
+		if ((parent == null) || (child == null)) return;
 		var minLine:LinePos = checker.getLinePos(parent.pos.min);
 		var maxLine:LinePos = checker.getLinePos(child.getPos().max);
 		var singleLine:Bool = (minLine.line == maxLine.line);
@@ -157,11 +159,11 @@ class NeedBracesCheck extends Check {
 		}
 		else {
 			if (singleLine) {
-				logPos('Body of "$parent" on same line', child.pos);
+				logPos('Body of "$parent" on same line', child.getPos());
 				return;
 			}
 		}
-		logPos('No braces used for body of "$parent"', child.pos);
+		logPos('No braces used for body of "$parent"', child.getPos());
 	}
 
 	function checkIfElseSingleline(parent:TokenTree, child:TokenTree):Bool {
diff --git a/src/checkstyle/checks/coding/NestedForDepthCheck.hx b/src/checkstyle/checks/coding/NestedForDepthCheck.hx
index c4a1d732..eb691ae0 100644
--- a/src/checkstyle/checks/coding/NestedForDepthCheck.hx
+++ b/src/checkstyle/checks/coding/NestedForDepthCheck.hx
@@ -56,7 +56,7 @@ class NestedForDepthCheck extends Check {
 	}
 
 	function warnNestedForDepth(depth:Int, pos:Position) {
-		logPos('Nested for depth is $depth (max allowed is ${max})', pos);
+		logPos('Nested loop depth is $depth (max allowed is ${max})', pos);
 	}
 
 	override public function detectableInstances():DetectableInstances {
diff --git a/src/checkstyle/checks/naming/CatchParameterNameCheck.hx b/src/checkstyle/checks/naming/CatchParameterNameCheck.hx
index ec8c98bd..e1d407cf 100644
--- a/src/checkstyle/checks/naming/CatchParameterNameCheck.hx
+++ b/src/checkstyle/checks/naming/CatchParameterNameCheck.hx
@@ -24,7 +24,9 @@ class CatchParameterNameCheck extends Check {
 
 		for (tkn in catchTokens) {
 			for (item in tkn.children) {
-				switch (item.getFirstChild().tok) {
+				var child:TokenTree = item.getFirstChild();
+				if (child == null) continue;
+				switch (child.tok) {
 					case Const(CIdent(name)):
 						if (item.is(POpen)) {
 							if (!formatRE.match(name)) logPos('"$name" must match pattern "~/${format}/"', item.pos);
diff --git a/src/checkstyle/checks/whitespace/IndentationCheck.hx b/src/checkstyle/checks/whitespace/IndentationCheck.hx
index f2373a78..08dc34f9 100644
--- a/src/checkstyle/checks/whitespace/IndentationCheck.hx
+++ b/src/checkstyle/checks/whitespace/IndentationCheck.hx
@@ -136,6 +136,7 @@ class IndentationCheck extends Check {
 			Sharp("elseif"),
 			Sharp("end"),
 			Sharp("error"),
+			Kwd(KwdFunction),
 			Kwd(KwdIf),
 			Kwd(KwdElse),
 			Kwd(KwdFor),
@@ -151,6 +152,8 @@ class IndentationCheck extends Check {
 					calcLineIndentationBkOpen(token, lineIndentation);
 				case BrOpen:
 					increaseBlockIndent(token, lineIndentation);
+				case Kwd(KwdFunction):
+					calcLineIndentationFunction(token, lineIndentation);
 				case Kwd(KwdIf), Kwd(KwdElse):
 					calcLineIndentationIf(token, lineIndentation);
 				case Kwd(KwdFor), Kwd(KwdDo), Kwd(KwdWhile):
@@ -182,6 +185,13 @@ class IndentationCheck extends Check {
 		increaseBlockIndent(token, lineIndentation);
 	}
 
+	function calcLineIndentationFunction(token:TokenTree, lineIndentation:Array<Int>) {
+		var body:TokenTree = TokenTreeAccessHelper.access(token).firstChild().lastChild().token;
+		if (body == null) return;
+		if (body.is(BrOpen)) return;
+		increaseIndentIfNextLine(token, body, lineIndentation);
+	}
+
 	function calcLineIndentationIf(token:TokenTree, lineIndentation:Array<Int>) {
 		switch (token.tok) {
 			case Kwd(KwdIf):
diff --git a/src/checkstyle/config/ConfigParser.hx b/src/checkstyle/config/ConfigParser.hx
index 21e0dc9a..16bddcfa 100644
--- a/src/checkstyle/config/ConfigParser.hx
+++ b/src/checkstyle/config/ConfigParser.hx
@@ -19,14 +19,15 @@ class ConfigParser {
 	public var overrideCheckerThreads:Int;
 	public var info:ChecksInfo;
 	public var checker:Checker;
+	public var validateMode:ConfigValidateMode;
 
 	var seenConfigPaths:Array<String>;
-	var failWith:String -> Void;
+	var failWithCallback:String -> Void;
 
 	public function new(failCallback:String -> Void) {
 		info = new ChecksInfo();
 		checker = new Checker();
-		failWith = failCallback;
+		failWithCallback = failCallback;
 
 		paths = [];
 		allExcludes = [];
@@ -34,6 +35,7 @@ class ConfigParser {
 		excludesMap = new Map();
 		numberOfCheckerThreads = 5;
 		overrideCheckerThreads = 0;
+		validateMode = STRICT;
 	}
 
 	public function loadConfig(path:String) {
@@ -151,7 +153,11 @@ class ConfigParser {
 	function createCheck(checkConf:CheckConfig):Check {
 		var check:Check = info.build(checkConf.type);
 		if (check == null) {
-			Sys.stdout().writeString('Unknown check \'${checkConf.type}\'');
+			switch (validateMode) {
+				case STRICT:
+					failWith('Unknown check "${checkConf.type}"');
+				case RELAXED:
+			}
 			return null;
 		}
 		checker.addCheck(check);
@@ -167,6 +173,7 @@ class ConfigParser {
 			var val = Reflect.field(checkConf.props, prop);
 			if (!checkFields.contains(prop)) {
 				failWith('Check ${check.getModuleName()} has no property named \'$prop\'');
+				continue;
 			}
 			try {
 				check.configureProperty(prop, val);
@@ -190,7 +197,7 @@ class ConfigParser {
 
 	function validateDefines(defines:Array<String>) {
 		for (define in defines) {
-			if (define.split("=").length > 2) throw "Found a define with more than one = sign: '" + define + "'";
+			if (define.split("=").length > 2) failWith("Found a define with more than one = sign: '" + define + "'");
 		}
 	}
 
@@ -235,4 +242,16 @@ class ConfigParser {
 		}
 		return count;
 	}
+
+	function failWith(msg:String) {
+		switch (validateMode) {
+			case STRICT: failWithCallback(msg);
+			case RELAXED:
+		}
+	}
+}
+
+enum ConfigValidateMode {
+	STRICT;
+	RELAXED;
 }
\ No newline at end of file
diff --git a/test/checks/coding/NestedForDepthCheckTest.hx b/test/checks/coding/NestedForDepthCheckTest.hx
index b7958cf6..82b2d682 100644
--- a/test/checks/coding/NestedForDepthCheckTest.hx
+++ b/test/checks/coding/NestedForDepthCheckTest.hx
@@ -13,7 +13,7 @@ class NestedForDepthCheckTest extends CheckTestCase<NestedForDepthCheckTests> {
 	@Test
 	public function testDefaultTooMany() {
 		var check = new NestedForDepthCheck();
-		assertMsg(check, TEST2, "Nested for depth is 2 (max allowed is 1)");
+		assertMsg(check, TEST2, "Nested loop depth is 2 (max allowed is 1)");
 	}
 
 	@Test
@@ -26,7 +26,7 @@ class NestedForDepthCheckTest extends CheckTestCase<NestedForDepthCheckTests> {
 
 		check.max = 0;
 		assertNoMsg(check, TEST1);
-		assertMsg(check, TEST2, "Nested for depth is 1 (max allowed is 0)");
+		assertMsg(check, TEST2, "Nested loop depth is 1 (max allowed is 0)");
 	}
 }
 
diff --git a/test/checks/whitespace/IndentationCheckTest.hx b/test/checks/whitespace/IndentationCheckTest.hx
index 38c4b669..a7f95a10 100644
--- a/test/checks/whitespace/IndentationCheckTest.hx
+++ b/test/checks/whitespace/IndentationCheckTest.hx
@@ -10,6 +10,7 @@ class IndentationCheckTest extends CheckTestCase<IndentationCheckTests> {
 		var check = new IndentationCheck();
 		check.severity = SeverityLevel.INFO;
 		assertNoMsg(check, CORRECT_TAB_INDENT);
+		assertNoMsg(check, FUNCTION_BODY_NO_BRACES);
 		assertMsg(check, CORRECT_SPACE_INDENT, 'Indentation mismatch: expected: "\\t"[1], actual: no indentation');
 	}
 
@@ -301,4 +302,10 @@ class Test {
 /*
  * test comment
  */";
+
+	var FUNCTION_BODY_NO_BRACES = "
+class Test {
+	public function toString()
+		return 'Test class';
+}";
 }
\ No newline at end of file
diff --git a/test/config/ConfigParserTest.hx b/test/config/ConfigParserTest.hx
index f3be7965..f44d04e5 100644
--- a/test/config/ConfigParserTest.hx
+++ b/test/config/ConfigParserTest.hx
@@ -173,4 +173,36 @@ class ConfigParserTest {
 
 		Assert.areEqual("exclude configuration file has unknown version: 0", failMessage);
 	}
+
+	@Test
+	public function testValidateMode() {
+		var failMessage:String = "";
+		var configParser:ConfigParser = new ConfigParser(function (message:String) {
+			failMessage = message;
+		});
+		configParser.validateMode = RELAXED;
+
+		Assert.isNotNull(configParser.checker.checks);
+		Assert.isTrue(configParser.checker.checks.length == 0);
+
+		var config:Config = {
+				version: 0,
+				checks: [{
+					"type": "non existing check name"
+				},
+				{
+					"type": "Trace",
+					"props": {
+						"non_existing_property": 100
+					}
+				}]
+			};
+		configParser.parseAndValidateConfig(config, LOCAL_PATH);
+
+		Assert.areEqual("", failMessage);
+
+		configParser.validateMode = STRICT;
+		configParser.parseAndValidateConfig(config, LOCAL_PATH);
+		Assert.areEqual("Check Trace has no property named 'non_existing_property'", failMessage);
+	}
 }
\ No newline at end of file