Read the validation message
Stay on the current screen and review the field-level or top-level error shown by ERP.
Related guide: Main Erp NavigationConfirm company and period
Verify the company, date and accounting period are correct and currently open.
Check required details
Review missing master data, quantities, account selections, permission and duplicated references.
Retry carefully
Check whether the transaction was already saved before retrying; avoid creating duplicate invoices or vouchers.
Contact support
Send the document type, non-sensitive error details and time to your support team; never share credentials.