In some situation could happen that after installing cumulative updates there are missing some SYP labels.

Solution : 

1. Stop AOS
2. Delete ALD and AUC files from Microsoft Dynamics AX\60\Server\<instance>\bin\Application\Appl\Standard
// Note : In search type.ald, .alc and delete files

3. Start AOS again.

That's It..

Issue : 
Some times we face the same labels issue after upgrading sql server
Example: upgrading from Sql 2012 to Sql 2014

Solution : 
http://technet.microsoft.com/EN-US/library/hh389762.aspx