Error
Error Code:
583
SAP S/4HANA Error 583: API Connection Missing
Description
This error indicates that an API connection, which SAP S/4HANA or a connected system attempted to use, could not be found or does not exist in the system's configuration. It typically occurs when an external system tries to integrate with S/4HANA, or an internal process attempts to call an external API without a properly defined connection.
Error Message
ERR_API_CONNECTION_DOES_NOT_EXIST
Known Causes
4 known causesMissing API Configuration
The required API connection details have not been set up or correctly maintained within SAP S/4HANA or the connected system.
Incorrect Connection Name/ID
The API call or integration scenario is referencing a connection by a name or ID that does not match any existing configuration.
Deleted Connection
The API connection that was previously configured has been inadvertently or intentionally deleted from the system.
Environment Mismatch
The API connection exists in a different environment (e.g., development) but is missing or named differently in the target environment (e.g., production).
Solutions
4 solutions available1. Verify SAP Gateway Service Registration easy
Ensures the necessary SAP Gateway services are active and registered for API communication.
1
Log in to your SAP S/4HANA system using SAP GUI.
2
Execute transaction code SICF.
3
In the 'External Services' field, enter the relevant service name. Common services for API connections include 'odata', 'sap', or specific service names related to the API you are trying to use (e.g., 'API_BUSINESS_PARTNER'). If you are unsure of the exact service, you may need to consult the documentation for the specific API or integration scenario.
4
Press F8 or click the 'Execute' button.
5
Check the 'Active' checkbox for the service. If it's not active, double-click on the service and activate it by clicking the 'Deactivate/Activate Service' button (or pressing Ctrl+F3).
6
If the service is not found, you may need to register it. This often involves activating ICF nodes. Navigate to 'SAP Gateway Service Consumption' (transaction SPRO -> SAP Gateway -> OData Service Registration -> Registration of SAP Gateway Settings) and ensure relevant services are registered and active.
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For external integrations, ensure the SAP Gateway configuration (transaction /IWFND/MAINT_SERVICE) has the correct service registered and active.
2. Check SAP Gateway System Alias Configuration medium
Confirms that the system alias used by the API client correctly points to the S/4HANA backend system.
1
Log in to your SAP S/4HANA system using SAP GUI.
2
Execute transaction code /IWFND/MAINT_SERVICE.
3
In the 'System Alias' field, enter the alias that your API client is configured to use. This is often specified in the connection settings of the consuming application or middleware.
4
Press F8 or click the 'Execute' button.
5
Verify that the system alias is correctly configured and points to the correct backend system. This typically involves checking the 'System ID', 'Client', and 'Gateway Host/Service'.
6
If the system alias is missing or incorrect, you will need to create or modify it. Click the 'Add System Alias' button and provide the necessary details. Ensure the 'Default Alias' setting is appropriate for your scenario.
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After making changes, save the configuration.
3. Review SAP Gateway Client Connection and Authentication medium
Validates the connection details and authentication credentials used by the API consumer to connect to SAP Gateway.
1
Identify the client application or middleware that is making the API call to SAP S/4HANA.
2
Access the connection settings of this client. This could be in a configuration file, a cloud platform integration service, or the client application's own settings.
3
Verify the following parameters:
4
- **Gateway Host/URL**: Ensure this points to the correct hostname or IP address of your SAP Gateway instance (often the S/4HANA application server or a dedicated Gateway server).
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- **Gateway Service Port**: Confirm the correct port is used (e.g., 443 for HTTPS, 80 for HTTP).
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- **System Alias**: This should match the system alias configured in SAP Gateway (as per Solution 2).
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- **Authentication Method**: Check if it's Basic Authentication, OAuth, SAML, or another method.
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- **Credentials**: If using Basic Authentication or similar, ensure the username and password are correct and the user exists in SAP S/4HANA with the necessary authorizations.
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- **SSL/TLS Certificates**: If using HTTPS, ensure that the client trusts the server's SSL certificate and that the certificate is valid.
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For authentication issues, consider using SAP's built-in tools like the 'SAP Gateway Client' (transaction /IWFND/GW_CLIENT) in SAP GUI to test connectivity and authentication with the specific service.
4. Check Network Connectivity and Firewall Rules medium
Ensures that network paths are open and firewalls are not blocking communication between the API client and SAP Gateway.
1
Determine the IP address or hostname of your SAP Gateway instance. This is usually the S/4HANA application server or a dedicated Gateway server.
2
Identify the port(s) that SAP Gateway is listening on for API requests. Common ports are 443 (HTTPS) or 80 (HTTP). The specific port can be found in the SAP system's network configuration or by checking the ICM (Internet Communication Manager) status in transaction SMICM.
3
From the machine where the API client is running, attempt to establish a network connection to the SAP Gateway host and port. You can use tools like `telnet` or `nc` (netcat) for this.
4
Example using telnet (replace `gateway_host` and `port`):
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bash
telnet gateway_host port
telnet gateway_host port
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If the connection fails, it indicates a network or firewall issue. You will need to work with your network administrators to:
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- **Check Firewall Rules**: Ensure that traffic is allowed from the API client's IP address to the SAP Gateway's IP address on the required port(s).
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- **Verify Network Routes**: Confirm that there are no routing issues preventing communication.
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- **Proxy Servers**: If a proxy server is involved, ensure it is configured correctly to allow the API traffic.
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If using HTTPS, also ensure that the necessary TLS/SSL ports are open.