diff --git a/sources/Forms/Block/Expression/AbstractExpressionFormBlock.php b/sources/Forms/Block/Expression/AbstractExpressionFormBlock.php
index b78cfa8ff..e2fc160a8 100644
--- a/sources/Forms/Block/Expression/AbstractExpressionFormBlock.php
+++ b/sources/Forms/Block/Expression/AbstractExpressionFormBlock.php
@@ -11,6 +11,7 @@ use Combodo\iTop\Forms\Block\AbstractFormBlock;
 use Combodo\iTop\Forms\Block\FormBlockException;
 use Combodo\iTop\Forms\IO\Format\BooleanIOFormat;
 use Combodo\iTop\Forms\Register\IORegister;
+use Exception;
 use Expression;
 use Symfony\Component\Form\FormEvents;
 
@@ -52,9 +53,13 @@ abstract class AbstractExpressionFormBlock extends AbstractFormBlock
 			foreach ($aParamsToResolve as $sParamToResolve) {
 				$aResolvedParams[$sParamToResolve] = strval($this->GetInputValue($sParamToResolve));
 			}
+			$aFieldsToResolve = $oExpression->ListRequiredFields();
+			foreach ($aFieldsToResolve as $sFieldToResolve) {
+				$aResolvedParams[$sFieldToResolve] = strval($this->GetInputValue($sFieldToResolve));
+			}
 			return $oExpression->Evaluate($aResolvedParams);
-		} catch (\Exception $e) {
-			throw new FormBlockException('Compute expression '.json_encode($sExpression).' block issue', 0, $e);
+		} catch (Exception $e) {
+			throw new FormBlockException('Compute expression '.json_encode($sExpression).' block issue: '.$e->getMessage(), 0, $e);
 		}
 	}
 
diff --git a/sources/Forms/FormsException.php b/sources/Forms/FormsException.php
index 1f5a2e671..99d9cd62f 100644
--- a/sources/Forms/FormsException.php
+++ b/sources/Forms/FormsException.php
@@ -19,4 +19,10 @@ use Throwable;
  */
 class FormsException extends Exception
 {
+	public function __construct(string $sMessage = '', int $iCode = 0, ?Throwable $oPrevious = null, array $aContext = [])
+	{
+		parent::__construct($sMessage, $iCode, $oPrevious);
+		IssueLog::Exception(get_class($this).' occurs: '.$sMessage, $this, null, $aContext);
+	}
+
 }
diff --git a/sources/Forms/IO/AbstractFormIO.php b/sources/Forms/IO/AbstractFormIO.php
index d203b7bda..80d77c527 100644
--- a/sources/Forms/IO/AbstractFormIO.php
+++ b/sources/Forms/IO/AbstractFormIO.php
@@ -86,7 +86,7 @@ class AbstractFormIO
 	public function SetName(string $sName): self
 	{
 		// Check name validity
-		if (preg_match('/(?<name>\w+)/', $sName, $aMatches)) {
+		if (preg_match('/^(?<name>((\w+\.\w+)|\w+))$/', $sName, $aMatches)) {
 			$sParsedName = $aMatches['name'];
 			if ($sParsedName !== $sName) {
 				$sName = json_encode($sName);
diff --git a/tests/php-unit-tests/unitary-tests/sources/Forms/AbstractFormsTest.php b/tests/php-unit-tests/unitary-tests/sources/Forms/AbstractFormsTest.php
index 35950fc2e..143791ff1 100644
--- a/tests/php-unit-tests/unitary-tests/sources/Forms/AbstractFormsTest.php
+++ b/tests/php-unit-tests/unitary-tests/sources/Forms/AbstractFormsTest.php
@@ -25,16 +25,16 @@ abstract class AbstractFormsTest extends ItopDataTestCase
 {
 	public function GivenInput(string $sName, string $sType = StringIOFormat::class): FormInput
 	{
-		$oBlock = $this->GivenFormBlock($sName.'_block');
+		$oBlock = $this->GivenFormBlock($sName);
 
-		return new FormInput($sName.'_input', $sType, $oBlock);
+		return new FormInput($sName, $sType, $oBlock);
 	}
 
 	public function GivenOutput(string $sName, string $sType = StringIOFormat::class): FormOutput
 	{
-		$oBlock = $this->GivenFormBlock($sName.'_block');
+		$oBlock = $this->GivenFormBlock($sName);
 
-		return new FormOutput($sName.'_output', $sType, $oBlock);
+		return new FormOutput($sName, $sType, $oBlock);
 	}
 
 	public function GivenFormBlock(string $sName): FormBlock
diff --git a/tests/php-unit-tests/unitary-tests/sources/Forms/IO/AbstractFormIOTest.php b/tests/php-unit-tests/unitary-tests/sources/Forms/IO/AbstractFormIOTest.php
index 7b4c09209..c2a42ce83 100644
--- a/tests/php-unit-tests/unitary-tests/sources/Forms/IO/AbstractFormIOTest.php
+++ b/tests/php-unit-tests/unitary-tests/sources/Forms/IO/AbstractFormIOTest.php
@@ -67,7 +67,7 @@ class AbstractFormIOTest extends AbstractFormsTest
 	 * @return void
 	 * @throws \Combodo\iTop\Forms\IO\FormBlockIOException
 	 */
-	public function testNameFormatSupportsOnlyLettersUnderscoreAndNumbers(string $sName, bool $bGenerateException = true)
+	public function testNameFormatSupportsOnlyLettersUnderscoreAndNumbersAndDot(string $sName, bool $bGenerateException = true)
 	{
 
 		if ($bGenerateException) {
@@ -75,7 +75,7 @@ class AbstractFormIOTest extends AbstractFormsTest
 		}
 		$oInput = $this->GivenInput($sName);
 		if (!$bGenerateException) {
-			$this->assertEquals($sName.'_input', $oInput->GetName());
+			$this->assertEquals($sName, $oInput->GetName());
 		}
 	}
 
@@ -88,12 +88,15 @@ class AbstractFormIOTest extends AbstractFormsTest
 			'Percent not supported' => ['name%'],
 			'Accent not supported' => ['namé'],
 			'emoji not supported' => ['🎄🎄🎄🎄🎄'],
+			'.name not supported' => ['.name'],
+			'name. not supported' => ['name.'],
 
 			// Corrects
 			'Numbers OK' => ['name123', false],
 			'Starting with number OK' => ['123name123', false],
 			'Underscore OK' => ['The_test_name', false],
 			'Camel OK' => ['TheTestName', false],
+			'name.subname OK' => ['name.subname', false],
 		];
 	}