I've just been investigating a problem with sending and receiving mail in Sugar (OS 4.2.0d) and I turned on debugging to check things out, it was then that I noticed that many errors and warnings appear complaining about the laguage file en_us.lang.php not being available, one such message is here:

Fatal error: return_module_language(): Failed opening required 'modules//language/en_us.lang.php' (include_path='.:/usr/local/lib/php') in /usr/local/apache2/htdocs/crm/include/utils.php on line 694

Now, modules//language/en_us.lang.php does not exist, the language directory doesn't exist at all and I'd like to solve the problem. Has anyone come across this and can give me a pointer to its resolution?

Thanks in advance

Regards

John