Error
Error Code:
1804
SAP S/4HANA Error 1804: Shared Memory Access Denied
Description
This error indicates that the current user or an SAP process running under a specific user context lacks the necessary operating system permissions to attach to a required shared memory segment. It typically occurs when an SAP application attempts to allocate or access resources in shared memory without sufficient privileges, often during system startup, transaction execution, or background job processing.
Error Message
The user does not have permission to access the shared memory segment
Known Causes
3 known causesInsufficient OS User Permissions
The operating system user account running the SAP instance or specific SAP processes does not have the necessary permissions to access shared memory segments.
Incorrect SAP System User Context
An SAP application or service is attempting to utilize shared memory under a user context that lacks the required operating system-level authorizations.
Operating System Shared Memory Configuration
Underlying operating system kernel parameters related to shared memory (e.g., shmmax, shmall) are not correctly configured for SAP S/4HANA requirements.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service