Functional Description
Purpose
This function returns an error if the third account number received exists in the Account Master 
F0901. It performs this validation to prevent the creation of records with duplicate third account 
numbers.
Technical Specification
 Open F0901 table
 Select a F0901 record using the third account number as the key
 If the record exists
^
D0900374 - Is Third Account Number Unique
| Parameter Name | Data Item | Data Type | Req/Opt | I/O/Both | 
|---|---|---|---|---|
| szAccountNumber3rd | ANS | char | NONE | NONE | 
Special Input Expected
  | ||||
| szAccountID | AID | char | NONE | NONE | 
Special Input Expected
  | ||||
| None | 
| F0901 Account Master |