Message type: E = Error
Message class:  EK - IS-U Accounts Receivable and Payable 
Message number: 494
Message text: No statistics indicator is to be maintained for transaction &1 &2
Transaction &V1& &V2& was allocated to a non-statistical internal
transaction, therefore you are not allowed to maintain a statistics
indicator for the transaction.
Delete the value maintained as statistics indicator.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message EK494 ("No statistics indicator is to be maintained for transaction &1 &2") typically occurs in the context of materials management and purchasing when there is an attempt to maintain or access statistical data for a transaction type that does not have a statistics indicator defined.
Cause:
The error is usually caused by one of the following reasons:
Missing Configuration: The transaction type (e.g., purchase order, contract) does not have a statistics indicator assigned in the configuration settings.
Incorrect Transaction Type: The transaction type being used may not be intended for statistical analysis, or it may not be set up correctly in the system.
Data Entry Issues: There may be issues with the data being entered or processed that do not align with the expected configuration.
Solution:
To resolve the EK494 error, you can take the following steps:
Check Configuration:
Go to the configuration settings in SAP (Transaction SPRO).
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