diff --git a/htdocs/core/modules/printing/modules_printing.php b/htdocs/core/modules/printing/modules_printing.php
index fa86d832b73..26268e7c183 100644
--- a/htdocs/core/modules/printing/modules_printing.php
+++ b/htdocs/core/modules/printing/modules_printing.php
@@ -67,7 +67,11 @@ class PrintingDriver
 		$list = array();
 
 		$listoffiles = array();
-		$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		if (!empty($conf->modules_parts['printing'])) {
+			$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		} else {
+			$dirmodels = array('/core/modules/printing/');
+		}
 		foreach ($dirmodels as $dir) {
 			$tmpfiles = dol_dir_list(dol_buildpath($dir, 0), 'all', 0, '\.modules.php', '', 'name', SORT_ASC, 0);
 			if (!empty($tmpfiles)) {
diff --git a/htdocs/core/modules/printing/printgcp.modules.php b/htdocs/core/modules/printing/printgcp.modules.php
index 226ed6c43cd..964558de8df 100644
--- a/htdocs/core/modules/printing/printgcp.modules.php
+++ b/htdocs/core/modules/printing/printgcp.modules.php
@@ -116,8 +116,8 @@ class printing_printgcp extends PrintingDriver
 				'type'=>'info',
 			);
 		} else {
-			$this->google_id = $conf->global->OAUTH_GOOGLE_ID;
-			$this->google_secret = $conf->global->OAUTH_GOOGLE_SECRET;
+			$this->google_id = getDolGlobalString('OAUTH_GOOGLE_ID');
+			$this->google_secret = getDolGlobalString('OAUTH_GOOGLE_SECRET');
 			// Token storage
 			$storage = new DoliStorage($this->db, $this->conf);
 			//$storage->clearToken($this->OAUTH_SERVICENAME_GOOGLE);
diff --git a/htdocs/includes/OAuth/Common/Storage/DoliStorage.php b/htdocs/includes/OAuth/Common/Storage/DoliStorage.php
index 8bd15b7602e..48b0b78f381 100644
--- a/htdocs/includes/OAuth/Common/Storage/DoliStorage.php
+++ b/htdocs/includes/OAuth/Common/Storage/DoliStorage.php
@@ -141,14 +141,18 @@ class DoliStorage implements TokenStorageInterface
 		dol_syslog("hasAccessToken service=".$service);
 
 		$sql = "SELECT token FROM ".MAIN_DB_PREFIX."oauth_token";
-		$sql .= " WHERE service = '".$this->db->escape($service.($this->keyforprovider?'-'.$this->keyforprovider:''))."'";
+		$sql .= " WHERE service = '".$this->db->escape($service.(empty($this->keyforprovider) ? '' : '-'.$this->keyforprovider))."'";
 		$sql .= " AND entity IN (".getEntity('oauth_token').")";
 		$resql = $this->db->query($sql);
 		if (! $resql) {
 			dol_print_error($this->db);
 		}
 		$result = $this->db->fetch_array($resql);
-		$token = unserialize($result['token']);
+		if ($result) {
+			$token = unserialize($result['token']);
+		} else {
+			$token = '';
+		}
 
 		$this->tokens[$service] = $token;
 
diff --git a/htdocs/printing/admin/printing.php b/htdocs/printing/admin/printing.php
index a0849f082e8..cc85407d391 100644
--- a/htdocs/printing/admin/printing.php
+++ b/htdocs/printing/admin/printing.php
@@ -135,7 +135,12 @@ if ($mode == 'setup' && $user->admin) {
 	$submit_enabled = 0;
 
 	if (!empty($driver)) {
-		$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		if (!empty($conf->modules_parts['printing'])) {
+			$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		} else {
+			$dirmodels = array('/core/modules/printing/');
+		}
+
 		foreach ($dirmodels as $dir) {
 			if (file_exists(dol_buildpath($dir, 0).$driver.'.modules.php')) {
 				$classfile = dol_buildpath($dir, 0).$driver.'.modules.php';
@@ -253,7 +258,13 @@ if ($mode == 'config' && $user->admin) {
 
 	$object = new PrintingDriver($db);
 	$result = $object->listDrivers($db, 10);
-	$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+
+	if (!empty($conf->modules_parts['printing'])) {
+		$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+	} else {
+		$dirmodels = array('/core/modules/printing/');
+	}
+
 	foreach ($result as $driver) {
 		foreach ($dirmodels as $dir) {
 			if (file_exists(dol_buildpath($dir, 0).$driver.'.modules.php')) {
@@ -296,7 +307,12 @@ if ($mode == 'test' && $user->admin) {
 
 	print '<table class="noborder centpercent">';
 	if (!empty($driver)) {
-		$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		if (!empty($conf->modules_parts['printing'])) {
+			$dirmodels = array_merge(array('/core/modules/printing/'), (array) $conf->modules_parts['printing']);
+		} else {
+			$dirmodels = array('/core/modules/printing/');
+		}
+
 		foreach ($dirmodels as $dir) {
 			if (file_exists(dol_buildpath($dir, 0).$driver.'.modules.php')) {
 				$classfile = dol_buildpath($dir, 0).$driver.'.modules.php';
diff --git a/htdocs/printing/index.php b/htdocs/printing/index.php
index 2d20db4ddf7..7ce4399501b 100644
--- a/htdocs/printing/index.php
+++ b/htdocs/printing/index.php
@@ -59,7 +59,7 @@ foreach ($result as $driver) {
 	$langs->load($driver);
 	$printer = new $classname($db);
 	$keyforprinteractive = $printer->active;
-	if ($keyforprinteractive && $conf->global->$keyforprinteractive) {
+	if ($keyforprinteractive && getDolGlobalString($keyforprinteractive)) {
 		//$printer->listJobs('commande');
 		$result = $printer->listJobs();
 		print $printer->resprint;