Hi to all
These problems is the missing about define in a file of your language. If you are using linux enter in the directory about osCommerce/admin and write grep ADMIN_EMAIL_SUBJECT * for first time if you don't find continue with grep ADMIN_EMAIL_SUBJECT */*. Each command /* will give access to the next directory.. and i suppose if you use these approach you are con determine the error; Any way in order to solve the problem you have to these command
define('ADMIN_EMAIL_SUBJECT ', 'the text you want'); in the appropriate file. if you give me the name of the program you use i can try to help you.
Workin