Error
Error Code:
688
SAP S/4HANA Error 688: File Write I/O Failure
Description
Error 688, ERR_IO_FAILURE_ON_FILE_WRITE, indicates that SAP S/4HANA encountered a problem while attempting to write data to a file on the underlying storage system. This typically occurs during data saving, logging, or system operations that require persistent storage.
Error Message
ERR_IO_FAILURE_ON_FILE_WRITE
Known Causes
4 known causesInsufficient Disk Space
The storage device where SAP S/4HANA is attempting to write data has run out of available space, preventing the write operation.
File System Permissions
The SAP S/4HANA system user lacks the necessary write permissions for the target directory or file, leading to the I/O failure.
Network Storage Issues
If writing to a network-attached storage (NAS) or shared drive, network connectivity problems or issues with the remote storage can cause write failures.
Disk or File System Corruption
Underlying hardware issues, bad sectors on the disk, or file system corruption can prevent successful data write operations.
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