Error
Error Code:
1801
SAP S/4HANA Error 1801: Invalid Shared Memory Pointer
Description
Error 1801, ERR_SHM_DROP_REMOVED_IDENTIFIER, indicates that the system attempted to access or manipulate a shared memory segment using an identifier (shmid) that is no longer valid or has been deallocated. This typically occurs when a process tries to interact with a shared memory segment that another process has already removed or that the operating system has reclaimed.
Error Message
ERR_SHM_DROP_REMOVED_IDENTIFIER
Known Causes
3 known causesPremature Shared Memory Deallocation
A process deallocated a shared memory segment while other processes or system components were still attempting to use its identifier, leading to a dangling pointer.
Incorrect Identifier Handling
An application or system component is attempting to access a shared memory segment using an outdated, incorrect, or previously freed identifier.
System Resource Cleanup
The operating system or SAP system performed an automated cleanup of unused or orphaned shared memory segments, unexpectedly removing the identifier.
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