Part group
Isah first checks the ledger accounts specified for the part group of the part to which the posting relates. If a relevant ledger account has been entered here, it will be selected.
Safety net
If no ledger account is found, the safety net accounts will be checked. These accounts are intended to catch postings for which no ledger accounts could be found based on the above search path.
Note: If no ledger account was found in the search path and no safety net account has been set, the posting will not be made.