diff --git a/src/oca/ruby/opennebula/flow/service_pool.rb b/src/oca/ruby/opennebula/flow/service_pool.rb
index 02823440d5..f2f84d582c 100644
--- a/src/oca/ruby/opennebula/flow/service_pool.rb
+++ b/src/oca/ruby/opennebula/flow/service_pool.rb
@@ -55,8 +55,12 @@ module OpenNebula
             @one_pool   = nil
 
             if @client
-                info     = Nokogiri::XML(@client.call('user.info', -1))
-                @user_id = Integer(info.xpath('/USER/ID').text)
+                rc = @client.call('user.info', -1)
+
+                unless OpenNebula.is_error?(rc)
+                    info     = Nokogiri::XML(rc)
+                    @user_id = Integer(info.xpath('/USER/ID').text)
+                end
             end
 
             super('DOCUMENT_POOL', 'DOCUMENT', @client)