diff --git a/core/log.class.inc.php b/core/log.class.inc.php
index 98852acfd..0e4962c43 100644
--- a/core/log.class.inc.php
+++ b/core/log.class.inc.php
@@ -691,11 +691,26 @@ abstract class LogAPI
 		static::$m_oMockMetaModelConfig = $oMetaModelConfig;
 	}
 
-	public static function Exception(string $sMessage, throwable $previous, string $sChannel = null, array $aContext = []): void
+	public static function Exception(string $sMessage, throwable $oException, string $sChannel = null, array $aContext = []): void
 	{
-		$aContext['Error Message'] = $previous->getMessage();
-		$aContext['Stack Trace'] = $previous->getTraceAsString();
-		static::Error($sMessage, $sChannel, $aContext);
+		$aErrorLogs = [];
+		$aErrorLogs[] = static::PrepareErrorLog($sMessage, $oException, $aContext);
+		$oException = $oException->getPrevious();
+		while ($oException !== null) {
+			$aErrorLogs[] = static::PrepareErrorLog($oException->getMessage(), $oException, $aContext, true);
+			$oException = $oException->getPrevious();
+		}
+		$aErrorLogs = array_reverse($aErrorLogs);
+		foreach ($aErrorLogs as $aErrorLog) {
+			static::Error($aErrorLog['message'], $sChannel, $aErrorLog['context']);
+		}
+	}
+
+	private static function PrepareErrorLog(string $sMessage, throwable $oException, array $aContext, bool $isPrevious = false): array
+	{
+		$aContext['Error Message'] = $oException->getMessage();
+		$aContext['Stack Trace'] = $oException->getTraceAsString();
+		return ['message' => ($isPrevious ? "Previous " : '')."Exception: $sMessage", 'context' => $aContext];
 	}
 
 	public static function Error($sMessage, $sChannel = null, $aContext = [])
diff --git a/pages/UI.php b/pages/UI.php
index ce93b0614..02f02738e 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -1375,7 +1375,7 @@ try {
 		$oErrorPage->add("<h1>".Dict::S('UI:FatalErrorMessage')."</h1>\n");
 	}
 	$sErrorDetails = ($e instanceof CoreException) ? $e->getHtmlDesc() : $e->getMessage();
-	$oErrorPage->error(Dict::Format('UI:Error_Details', utils::EscapeHtml($sErrorDetails)));
+	$oErrorPage->error(Dict::Format('UI:Error_Details', utils::EscapeHtml($sErrorDetails)), $e);
 	$oErrorPage->output();
 
 	$sErrorStackTrace = ($e instanceof CoreException) ? $e->getFullStackTraceAsString() : $e->getTraceAsString();
@@ -1394,7 +1394,7 @@ try {
 				$oLog->Set('data', $aData);
 				$oLog->DBInsertNoReload();
 			} catch (Exception $e) {
-				IssueLog::Error("Failed to log issue into the DB");
+				IssueLog::Exception("Failed to log issue into the DB", $e);
 			}
 		}
 	}
diff --git a/sources/Application/TwigBase/Controller/Controller.php b/sources/Application/TwigBase/Controller/Controller.php
index 0b86aa718..d6dcde90e 100644
--- a/sources/Application/TwigBase/Controller/Controller.php
+++ b/sources/Application/TwigBase/Controller/Controller.php
@@ -272,7 +272,7 @@ abstract class Controller extends AbstractController
 			$oP->add(get_class($e).' : '.utils::EscapeHtml($e->GetMessage()));
 			$oP->output();
 
-			IssueLog::Error($e->getMessage());
+			IssueLog::Exception('HandleOperation failed for '.json_encode($this->m_sOperation), $e);
 		}
 	}
 
diff --git a/sources/Application/WebPage/ErrorPage.php b/sources/Application/WebPage/ErrorPage.php
index e499c2c4a..b7af8a46d 100644
--- a/sources/Application/WebPage/ErrorPage.php
+++ b/sources/Application/WebPage/ErrorPage.php
@@ -51,7 +51,7 @@ class ErrorPage extends NiceWebPage
 		$this->log_warning($sText);
 	}
 
-	public function error($sText)
+	public function error($sText, \Throwable $oException = null)
 	{
 		$this->add("<div class=\"message message-error\">$sText</div>");
 		if (utils::IsEasterEggAllowed()) {
@@ -59,6 +59,10 @@ class ErrorPage extends NiceWebPage
 			$this->add('<img src="'.utils::GetAbsoluteUrlAppRoot().'images/alpha-fatal-error.gif">');
 			$this->add('<div class="message message-valid">'.nl2br(Dict::S('UI:ErrorPage:KittyDisclaimer')).'</div>');
 		}
+		if (!is_null($oException)) {
+			$this->log_exception($sText, $oException);
+			return;
+		}
 		$this->log_error($sText);
 	}
 
@@ -78,6 +82,10 @@ class ErrorPage extends NiceWebPage
 
 		return parent::output();
 	}
+	public static function log_exception($sText, \Throwable $oException)
+	{
+		IssueLog::Exception($sText, $oException);
+	}
 
 	public static function log_error($sText)
 	{
diff --git a/sources/Forms/Block/Base/FormBlock.php b/sources/Forms/Block/Base/FormBlock.php
index e6e84fdc3..4bf80a794 100644
--- a/sources/Forms/Block/Base/FormBlock.php
+++ b/sources/Forms/Block/Base/FormBlock.php
@@ -43,6 +43,8 @@ class FormBlock extends AbstractTypeFormBlock
 		try {
 			// Build the form
 			$this->BuildForm();
+		} catch (FormsException $e) {
+			throw $e;
 		} catch (Exception $e) {
 			throw new FormBlockException('Unable to construct form', 0, $e);
 		}
diff --git a/sources/Forms/IO/Converter/OqlToClassConverter.php b/sources/Forms/IO/Converter/OqlToClassConverter.php
index 66e36d71b..46baec02a 100644
--- a/sources/Forms/IO/Converter/OqlToClassConverter.php
+++ b/sources/Forms/IO/Converter/OqlToClassConverter.php
@@ -11,6 +11,7 @@ use Combodo\iTop\Service\DependencyInjection\DIException;
 use Combodo\iTop\Service\DependencyInjection\DIService;
 use Combodo\iTop\Forms\IO\Format\ClassIOFormat;
 use Combodo\iTop\Forms\IO\FormBlockIOException;
+use Exception;
 
 /**
  * OQL expression to class converter.
@@ -28,7 +29,11 @@ class OqlToClassConverter extends AbstractConverter
 		}
 
 		$oModelReflection = DIService::GetInstance()->GetService('ModelReflection');
-		$oQuery = $oModelReflection->GetQuery($oData);
+		try {
+			$oQuery = $oModelReflection->GetQuery($oData);
+		} catch (Exception $e) {
+			throw new FormBlockIOException($e->getMessage(), $e->getCode(), $e);
+		}
 		return new ClassIOFormat($oQuery->GetClass());
 	}
 }