ERROR MESSAGE
“Account INT-160600 not allowed to be defined as reconciliation account” .
Message No.: AC309
ANALYSIS
The above error message occured when saving the configuration changes in “Acquisition from affiliated company” through config transaction AO90. Here’s the configuration path that prompted the error:
Path: IMG → Financial Accounting → Asset Accounting → Integration with the General Ledger → Assign G/L Accounts.
Transaction Code: AO90 
G/L [...]

Error message:
“Account ‘Acquisition from affiliated company’ could not be found for area 01″
Message no.: AU133
 Analysis 
The above error message occured during posting of intercompany asset transfer through transaction code ‘ABT1N‘.
Path: SAP Easy Access  Menu → Accounting → Financial Accounting → Fixed Assets → Posting → Transfer →  Intercompany Asset Transfer .
Transaction Code: ABT1N
Diagnosis
When Creating the accounting document, the system could not find account [...]

Error message:
Posting can not be saved as reconciliation account has not been assigned to the vendor account.
Analysis:
During posting of an invoice to a vendor where general ledger account has not been defined in the vendor master data, the above error message occur.
Do note that vendor master data in the SAP system is treated as subsidiary [...]