| HASH_ID_MISSING | The hash ID is missing. | 
| INVALID_HASH_ID | The provided hash ID is invalid. | 
| TCS_DETAILS_NOT_FOUND | TCS details could not be found. | 
| TDS_DETAILS_NOT_FOUND | TDS details could not be found. | 
| SUBSCRIPTION_DETAILS_NOT_FOUND | Subscription details could not be found. | 
| EINVOICE_NOT_FOUND | The e-invoice could not be found. | 
| ITEM_NOT_FOUND | The item could not be found. | 
| DUPLICATE_DOC_SERIAL_NUMBER | The document serial number is duplicate. | 
| DOCUMENT_TYPE_NOT_FOUND | The document type could not be found. | 
| BATCH_OR_SERIAL_NUMBER_NOT_SELECTED | Batch or serial number not selected. | 
| RETURN_NOT_POSSIBLE_FOR_AVAILABLE_SERIAL_NUMBER | Return not possible for available serial number. | 
| INVALID_DOCUMENT_NUMBER | The document number is invalid. | 
| INVALID_SERIAL_NUMBER | The serial number is invalid. | 
| FORBIDDEN_USING_BACK_DATE | Forbidden using back date. | 
| DUPLICATE_SUPPLIER_INVOICE_SERIAL_NUMBER | Duplicate supplier invoice serial number. | 
| CAN_NOT_APPLY_TDS_AND_TCS_TOGETHER | Cannot apply TDS and TCS together. | 
| MISSING_BANK_ACCOUNT | The bank account is missing. | 
| AMOUNT_RECEIVED_GREATER_THAN_TOTAL_AMOUNT | Amount received is greater than total amount. | 
| SUBSCRIPTIONS_NOT_ENABLED | Subscriptions are not enabled. | 
| INVALID_REPEAT | The repeat value is invalid. | 
| INVALID_CUSTOM_COLUMN_VALUE | The custom column value is invalid. | 
| INVALID_HEADER_FORMAT | The header format is invalid. | 
| FREE_USER_EXPORT_LIMIT_EXCEEDED | Free user export limit exceeded. | 
| BANK_DETAILS_MISSING_NON_CASH | Bank details are missing for non-cash transactions. | 
| INVALID_TAX_RATE | The provided tax rate is invalid. | 
| DUPLICATE_PRODUCT_SERIAL_NUMBER | The product serial number is duplicate. | 
| INSUFFICIENT_STOCK | There is not enough stock available. | 
| PRODUCT_ALREADY_EXISTS | The product already exists in the system. | 
| CUSTOMER_NOT_FOUND | The customer could not be found. | 
| INVALID_CUSTOMER_ID | The provided customer ID is invalid. |