Error
Error Code:
1025
SAP S/4HANA Error 1025: Communication Failure Detected
Description
Error 1025, 'ERR_COM', indicates a general communication failure within SAP S/4HANA. This means the system encountered an issue while trying to exchange data with another internal component or an external system. It typically occurs during transactions requiring network access, such as integrations, remote calls, or web service interactions.
Error Message
ERR_COM
Known Causes
4 known causesNetwork Connectivity Issues
The server hosting SAP S/4HANA or the target system is experiencing network problems, preventing data transmission.
Incorrect System Configuration
Connection parameters for external systems, like RFC destinations or web service endpoints, are misconfigured in SAP S/4HANA.
Firewall or Security Block
A firewall, proxy server, or network security setting is blocking the communication attempt between SAP S/4HANA and the external system.
External System Unavailability
The external system that SAP S/4HANA is trying to communicate with is currently offline, unresponsive, or experiencing issues.
Solutions
4 solutions available1. Verify Network Connectivity Between SAP Instances easy
Ensures that all SAP S/4HANA components can communicate with each other over the network.
1
From the application server experiencing the error (e.g., the SAP GUI server or a middleware component), attempt to ping the database server.
ping <database_server_hostname_or_ip>2
From the database server, attempt to ping the application server.
ping <application_server_hostname_or_ip>3
Check if SAP Message Server (ms) and Gateway (gw) ports are open and reachable between all relevant SAP instances. Common ports are 32xx (gateway) and 36xx (message server), where xx is the SAP instance number.
telnet <hostname> <port>4
Ensure there are no firewall rules blocking communication between SAP servers. Consult your network administrator to verify firewall configurations.
2. Restart SAP Gateway and Message Server Services medium
Resets and restarts the core SAP communication services, which can resolve transient communication issues.
1
Log in to the SAP application server experiencing the error.
2
Identify the SAP instance number.
3
Stop the SAP Gateway service. The command depends on your operating system and SAP installation.
sapcontrol -nr <instance_number> -function StopGateway4
Stop the SAP Message Server service.
sapcontrol -nr <instance_number> -function StopMessageServer5
Wait for a few minutes to ensure services are fully stopped.
6
Start the SAP Message Server service.
sapcontrol -nr <instance_number> -function StartMessageServer7
Start the SAP Gateway service.
sapcontrol -nr <instance_number> -function StartGateway8
Monitor the SAP system logs (SM21) for any new communication errors after restarting the services.
3. Investigate SAP System Profile Parameters advanced
Reviews critical profile parameters related to communication and memory management that might be misconfigured.
1
Access transaction RZ10 on your SAP S/4HANA system.
2
Select the instance profile for the application server experiencing the error and choose 'Display'.
3
Review the following parameters for appropriate values. Consult SAP Notes and your system's performance guidelines for recommended settings.
4
Parameter: `rdisp/max_comm_entries` - Controls the maximum number of active communication entries. If too low, it can lead to communication failures.
5
Parameter: `rdisp/max_sys_routes` - Defines the maximum number of system routes. Insufficient values can impact communication between SAP instances.
6
Parameter: `gw/max_overflow_size` - Governs the size of the gateway overflow buffer. If this is too small, incoming requests might be rejected.
7
Parameter: `abap/heap_area_dia` and `abap/heap_area_nondia` - While not directly communication, insufficient memory can indirectly cause process instability and communication issues.
8
If changes are made, save the profile and restart the SAP application server instance for the changes to take effect.
4. Analyze SAP Gateway Trace Files advanced
Provides detailed logs of SAP Gateway activity to pinpoint the exact cause of communication breakdowns.
1
Access transaction `SMGW` (Gateway Monitor) on your SAP S/4HANA system.
2
Navigate to 'Goto' -> 'Trace' -> 'Switch On/Off' to enable gateway tracing.
3
Reproduce the error condition (e.g., by attempting the transaction or process that triggers the ERR_COM message).
4
Once the error occurs, go back to `SMGW` and navigate to 'Goto' -> 'Trace' -> 'Display Trace' to view the trace file.
5
Alternatively, you can access the trace files directly on the application server's file system. The location is typically defined by the `gw/trace_file` profile parameter.
6
Analyze the trace file for specific error messages, connection attempts, timeouts, or rejections that correlate with the ERR_COM error. Look for patterns related to specific hosts, ports, or user sessions.
7
If the trace is too verbose, consider adjusting the trace level (e.g., from level 1 to level 2 or 3) in `SMGW` for more detailed information, but be mindful of disk space and performance impact.