diff --git a/setup/compiler.class.inc.php b/setup/compiler.class.inc.php
index 61c883c68..574d15ab0 100644
--- a/setup/compiler.class.inc.php
+++ b/setup/compiler.class.inc.php
@@ -617,7 +617,21 @@ EOF;
 			// files to include (PHP datamodels)
 			foreach($oModule->GetFilesToInclude('business') as $sRelFileName)
 			{
-				$aDataModelFiles[] = "MetaModel::IncludeModule(MODULESROOT.'/$sRelativeDir/$sRelFileName');";
+				if (file_exists("{$sTempTargetDir}/{$sRelativeDir}/{$sRelFileName}")) {
+					$aDataModelFiles[] = "MetaModel::IncludeModule(MODULESROOT.'/$sRelativeDir/$sRelFileName');";
+				} else {
+					/** @noinspection NestedPositiveIfStatementsInspection */
+					if (utils::IsDevelopmentEnvironment()) {
+						$sMissingBusinessFileMessage = 'A module embeds a non existing file : check the module.php "datamodel" key !';
+						$aContext = [
+							'moduleId'       => $oModule->GetId(),
+							'moduleLocation' => $oModule->GetRootDir(),
+							'includedFile'   => $sRelFileName,
+						];
+						SetupLog::Error($sMissingBusinessFileMessage, null, $aContext);
+						throw new CoreException($sMissingBusinessFileMessage, $aContext);
+					}
+				}
 			}
 			// files to include (PHP webservices providers)
 			foreach($oModule->GetFilesToInclude('webservices') as $sRelFileName)
diff --git a/setup/modelfactory.class.inc.php b/setup/modelfactory.class.inc.php
index 603e337f2..9d5eb6787 100644
--- a/setup/modelfactory.class.inc.php
+++ b/setup/modelfactory.class.inc.php
@@ -139,7 +139,15 @@ class MFModule
 	 */
 	protected $sAutoSelect;
 	/**
-	 * @var array
+	 * @see ModelFactory::FindModules init of this structure from the module.*.php files
+	 * @var array{
+	 *          business: string[],
+	 *          webservices: string[],
+	 *          addons: string[],
+	 *     }
+	 * Warning, there are naming mismatches between this structure and the module.*.php :
+	 * - `business` here correspond to `datamodel` in module.*.php
+	 * - `webservices` here correspond to `webservice` in module.*.php
 	 */
 	protected $aFilesToInclude;