Hi:

Try this:

1. Go to the GESGTC function (Setup > General parameters > Inquiry screens).
2. In the left list, look for the SFC code
   
3. Click on the STD record and then click on the "Validation" button (in the right panel).

I think that will be enough. 

If you keep having problems like this type, you can do a massive validation of transactions in the path: Development > Utilities > Dictionary > Transaction generation.