Message type: E = Error
Message class:  FINS_IC_CUST - Manage Currencies: Customizing 
Message number: 020
Message text: Rnding diff acct &1 defined to post automatically; CoCode &2, ChtAccts &3
To post rounding differences, you must define special accounts for these
rounding differences in the project configuration.
A rounding difference account, such as &V1& that is used for company
code &V2& and chart of accounts &V3&, must fulfill the following
requirements:
The GL account type must be <LS>Nonoperating Expense or Income</>
(Attribute <AB>SKA1-GLACCOUNT_TYPE = 'N'</>).
The account currency must be equal to the local currency of the company
code
(Attribute <AB>SKB1-WAERS = T001-WAERS</>)
Posting to a rounding difference account with taxes isn't mandatory
(Attribute <AB>SKB1-XMWNO </>is initial).
A rounding difference account is not open-item-managed
(Attribute <AB>SKB1-XOPVW </>is initial).
Rounding difference account must not be defined as to <LS>Post
automatically only</>
(Attribute <AB>SKB1-XINTB </>is initial).
A rounding difference account must not be defined as a reconciliation
account
(Attribute <AB>SKB1-MITKZ </>is empty).
For rounding difference accounts, the balances must be managed in the
local currency only
(Attribute <AB>SKB1-XSALH = 'X'</>)
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
In the project configuration, ensure that the accounts used for rounding
differences comply with the requirements described above.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FINS_IC_CUST020 typically relates to issues with intercompany accounting, specifically concerning the automatic posting of rounding differences. This error indicates that there is a configuration issue with the rounding difference account that is defined for automatic posting in the specified company code and chart of accounts.
Cause: Configuration Issue: The rounding difference account is not properly configured in the system for the specified company code and chart of accounts. Missing Account: The rounding difference account may not exist in the specified chart of accounts. Posting Settings: The settings for automatic postings may not be correctly defined in the system. Intercompany Settings: There may be issues with the intercompany settings that affect how rounding differences are handled.
Solution: Check Configuration: Go to the configuration settings for intercompany accounting in SAP (Transaction code: SPRO). Navigate to Financial Accounting (New) > Financial Accounting Global Settings (New) > Intercompany Accounting > Define Rounding Difference Accounts. Ensure that the rounding difference account
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FINS_IC_CUST019 Rounding diff acct &1 is open-item-managed for CoCode &2 / ChtAccts &3
What causes this issue?  To post rounding differences, you must define special accounts for these rounding differences in the project configuration. A...
FINS_IC_CUST018 Rounding diff acct &1 requires posting with taxes; CoCode &2, ChtAcct &3
What causes this issue?  To post rounding differences, you must define special accounts for these rounding differences in the project configuration. A...
FINS_IC_CUST021 Rounding diff acct &1 is defined as reconciliation acct for CoCode &2
What causes this issue?  To post rounding differences, you must define special accounts for these rounding differences in the project configuration. A...
FINS_IC_CUST022 Balances of rounding diff acct &1 are not only managed in local currency
What causes this issue?  To post rounding differences, you must define special accounts for these rounding differences in the project configuration. A...
Click on this link to search all SAP messages.