diff --git a/4dev/tests/Logging/CoreLibsLoggingErrorMessagesTest.php b/4dev/tests/Logging/CoreLibsLoggingErrorMessagesTest.php
index 3c21d245..3393415d 100644
--- a/4dev/tests/Logging/CoreLibsLoggingErrorMessagesTest.php
+++ b/4dev/tests/Logging/CoreLibsLoggingErrorMessagesTest.php
@@ -96,9 +96,9 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 	public function testErrorMessageLevelOk(string $level, string $str, string $expected): void
 	{
 		$log = new \CoreLibs\Logging\Logging([
-			'log_file_id' => 'testErrorMessages',
+			'log_file_id' => 'testErrorMessagesLevelOk',
 			'log_folder' => self::LOG_FOLDER,
-			'log_level' => Level::Debug,
+			'log_level' => Level::Error,
 		]);
 		$em = new \CoreLibs\Logging\ErrorMessage($log);
 		$em->setMessage(
@@ -128,9 +128,9 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 	public function testErrorMessageOk(): void
 	{
 		$log = new \CoreLibs\Logging\Logging([
-			'log_file_id' => 'testErrorMessages',
+			'log_file_id' => 'testErrorMessagesOk',
 			'log_folder' => self::LOG_FOLDER,
-			'log_level' => Level::Debug
+			'log_level' => Level::Error
 		]);
 		$em = new \CoreLibs\Logging\ErrorMessage($log);
 		$em->setErrorMsg(
@@ -314,7 +314,7 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 	 * Undocumented function
 	 *
 	 * @dataProvider providerErrorMessageLog
-	 * @testdox Test Log writing [$_dataName]
+	 * @testdox Test Log writing with log level Error [$_dataName]
 	 *
 	 * @param  string      $id
 	 * @param  string      $level
@@ -324,7 +324,7 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 	 * @param  string      $expected
 	 * @return void
 	 */
-	public function testErrorMessageLog(
+	public function testErrorMessageLogErrorLevel(
 		string $id,
 		string $level,
 		string $str,
@@ -333,7 +333,63 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 		string $expected
 	): void {
 		$log = new \CoreLibs\Logging\Logging([
-			'log_file_id' => 'testErrorMessages',
+			'log_file_id' => 'testErrorMessagesLogError',
+			'log_folder' => self::LOG_FOLDER,
+			'log_level' => Level::Notice,
+			'log_per_run' => true
+		]);
+		$em = new \CoreLibs\Logging\ErrorMessage($log);
+		$em->setErrorMsg(
+			$id,
+			$level,
+			$str,
+			message: $message,
+			log_error: $log_error
+		);
+		$file_content = '';
+		if (is_file($log->getLogFolder() . $log->getLogFile())) {
+			$file_content = file_get_contents(
+				$log->getLogFolder() . $log->getLogFile()
+			) ?: '';
+		}
+		// if error, if null or false, it will not be logged
+		if ($level == 'error' && ($log_error === null || $log_error === false)) {
+			$this->assertStringNotContainsString(
+				$expected,
+				$file_content
+			);
+		} else {
+			$this->assertStringContainsString(
+				$expected,
+				$file_content
+			);
+		}
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @dataProvider providerErrorMessageLog
+	 * @testdox Test Log writing with log Level Debug [$_dataName]
+	 *
+	 * @param  string      $id
+	 * @param  string      $level
+	 * @param  string      $str
+	 * @param  string|null $message
+	 * @param  bool|null   $log_error
+	 * @param  string      $expected
+	 * @return void
+	 */
+	public function testErrorMessageLogErrorDebug(
+		string $id,
+		string $level,
+		string $str,
+		?string $message,
+		?bool $log_error,
+		string $expected
+	): void {
+		$log = new \CoreLibs\Logging\Logging([
+			'log_file_id' => 'testErrorMessagesLogDebug',
 			'log_folder' => self::LOG_FOLDER,
 			'log_level' => Level::Debug,
 			'log_per_run' => true
@@ -352,8 +408,8 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 				$log->getLogFolder() . $log->getLogFile()
 			) ?: '';
 		}
-		// if n
-		if ($level == 'error' && ($log_error === null || $log_error === false)) {
+		// if error, and log is debug level, only explicit false are not logged
+		if ($level == 'error' && $log_error === false) {
 			$this->assertStringNotContainsString(
 				$expected,
 				$file_content
diff --git a/www/admin/class_test.error_msg.php b/www/admin/class_test.error_msg.php
index 4863e77b..03d8e5cf 100644
--- a/www/admin/class_test.error_msg.php
+++ b/www/admin/class_test.error_msg.php
@@ -35,13 +35,16 @@ print '<div><h1>' . $PAGE_NAME . '</h1></div>';
 
 $em = new \CoreLibs\Logging\ErrorMessage($log);
 
+print "Log ERROR: " . $log->prAr($em->getFlagLogError()) . "<br>";
+
 print "FN: " . ml::fromName('Affe')->name . "<br>";
 print "NU: " . ml::fromValue(100)->name . "<br>";
 print "NU: " . ml::fromValue(1000)->name . "<br>";
 
-$em->setErrorMsg('123', 'error', 'msg this is bad, not logged');
-$em->setErrorMsg('123', 'error', 'msg this is bad, not logged', 'target-id', 'other-style');
-$em->setErrorMsg('123', 'error', 'msg this is bad, logged', log_error:true);
+$em->setErrorMsg('123', 'error', 'msg this is bad, auto logged if debug');
+$em->setErrorMsg('123', 'error', 'msg this is bad, auto logged if debug', 'target-id', 'other-style');
+$em->setErrorMsg('123', 'error', 'msg this is bad, logged always', log_error:true);
+$em->setErrorMsg('123', 'error', 'msg this is bad, never logged', log_error:false);
 $em->setErrorMsg('1000', 'info', 'This is good');
 $em->setErrorMsg('9999', 'abort', 'BAD: This is critical (abort)');
 $em->setErrorMsg('10-1000', 'wrong', 'Wrong level: This is emergency');
@@ -51,4 +54,6 @@ print "Errors: <pre>" . $log->prAr($em->getErrorMsg()) . "</pre>";
 
 print "</body></html>";
 
+$log->debug('[END]', '==========================================>');
+
 // __END__
diff --git a/www/lib/CoreLibs/Logging/ErrorMessage.php b/www/lib/CoreLibs/Logging/ErrorMessage.php
index c54c3c92..acd6cf8e 100644
--- a/www/lib/CoreLibs/Logging/ErrorMessage.php
+++ b/www/lib/CoreLibs/Logging/ErrorMessage.php
@@ -27,13 +27,19 @@ class ErrorMessage
 	 * init ErrorMessage
 	 *
 	 * @param  \CoreLibs\Logging\Logging $log
-	 * @param  bool                      $log_error [=false]
+	 * @param  null|bool                 $log_error [=null], defaults to false if log is not level debug
 	 */
 	public function __construct(
 		\CoreLibs\Logging\Logging $log,
-		bool $log_error = false
+		?bool $log_error = null
 	) {
 		$this->log = $log;
+		// if log default logging is debug then log_error is default set to true
+		if ($this->log->loggingLevelIsDebug() && $log_error === null) {
+			$log_error = true;
+		} else {
+			$log_error = $log_error ?? false;
+		}
 		$this->log_error = $log_error;
 	}