10001170 
Message
In 'Posting Date' field, enter posting date that is equal to or earlier than system date
Diagnosis
You have tried to create a sales document with a posting date that is later than the system date; however, the Allow Future Posting Date checkbox on the General tab of the Document Settings window (in 
Administration 
System Initialization 
) is not selected.
Procedure
Make sure to set a posting date that is equal to or earlier than the system date.