Cash Flow Extraction

Hi I am trying to complete a cash flow extraction. When I calculate the report I have a large number of errors all of which state the following 

No setup found for counterpart account 00000 in document GEN0000  (account number and Gen number change but also repeat themselves for some errors) 

There 6 pages of these errors and I can not find anything in the knowledge base to help me figure out why this is happening. 

Can anyone tell me why this is happening or how I might be able to fix it? 

Sincerely

Crystal