No special G/L acct defined for acct type & sp.G/L ind. & recon.acct &

What causes this issue?

You want to post via a special G/L indicator which was not maintained
completely in the system. The specification on which reconciliation
account is to be updated in the general ledger is missing.

System Response

The line item cannot be entered.

How to fix this error?

In system configuration enter a special G/L account corresponding to
reconciliation account &V3& for account type &V1& and special G/L
indicator &V2&.

Error message extract from SAP system. Copyright SAP SE.