What causes KUKA Robot alarm KRC0477?

Incorrect path syntax or invalid drive letter designation in file operations. Referencing a non-existent drive, partition, or storage device identifier. Typo in the path specification, such as missing forward slash, incorrect folder name, or invalid characters. Attempting to access a resource that requires proper mounting or configuration that has not been completed. Using outdated or incompatible path references from previous controller firmware versions.

How do I fix KUKA Robot alarm KRC0477?

1. Review the KRC program code where the alarm occurred and verify the exact path specification syntax against KUKA documentation standards 2. Confirm that the referenced drive or device (e.g., /R5 for compact flash) is physically present, properly mounted, and recognized by the controller 3. Check the file browser in WorkVisual or the SmartPAD terminal to validate the correct path structure and available storage locations 4. Correct the path specification to use proper KUKA naming conventions (e.g., /R5 for compact flash, /mnt for mounted drives) and ensure all folder names match existing directories 5. Verify that file system permissions and drive mappings are correctly configured in the controller settings 6. Save changes, recompile the program, and restart the controller if necessary to clear the alarm

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0477

KUKA Robot KRC0477 - Error in path

This alarm indicates a syntax error or invalid format in a file path specification within the KRC program or configuration. The path reference (such as /R5, /C1, or similar) does not conform to the expected naming convention or points to a non-existent resource on the KUKA controller. This typically occurs during program compilation, file access operations, or when referencing external devices and drives.

KUKA RobotSystemBasic

KRC0477

KUKA Robot KRC0477 - Error in path

Error in path

Common Causes

Incorrect path syntax or invalid drive letter designation in file operations
Referencing a non-existent drive, partition, or storage device identifier
Typo in the path specification, such as missing forward slash, incorrect folder name, or invalid characters
Attempting to access a resource that requires proper mounting or configuration that has not been completed
Using outdated or incompatible path references from previous controller firmware versions

Troubleshooting Steps

1Review the KRC program code where the alarm occurred and verify the exact path specification syntax against KUKA documentation standards
2Confirm that the referenced drive or device (e.g., /R5 for compact flash) is physically present, properly mounted, and recognized by the controller
3Check the file browser in WorkVisual or the SmartPAD terminal to validate the correct path structure and available storage locations
4Correct the path specification to use proper KUKA naming conventions (e.g., /R5 for compact flash, /mnt for mounted drives) and ensure all folder names match existing directories
5Verify that file system permissions and drive mappings are correctly configured in the controller settings
6Save changes, recompile the program, and restart the controller if necessary to clear the alarm

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