Hello!!
I hope someone can help me!?  I go and release one invoice at a time and when I release the invoice nothing is different but when I go and print that invoice a little box pops up and says  
Customer """" was not found. Invoices for this Customer will not printed.  I hit the o.k. box and it goes threw everything normal.  I post the invoice and it works.  I go and check if it is in the AR and it is, I check the invoice totals for the month and it is there also.  Does anyone know how I can get rid of this? I tried reindex two of the files arinvl and arinv.  Any other suggestions??  Thank you in advance!
Diana

Don't need to rebuild.  Scroll all the way to the top of the list of sales orders on the opening SO-A screen that lists the orders.  You have a blank one at the top of the list.  Delete it.

Nope, wish I did, if I did, I could make it go away....

Still sounds to me like a blank customer code.  In SO-A opening list, change the serarch key to customer code and then go to the top of the list, see if there is a record with a blank customer code.