What causes KUKA Robot alarm KRC0406?

File or object has write-protection flag enabled in file properties. Insufficient user access privileges or permission level to delete protected objects. System or kernel files that are permanently protected by the controller. Network drive or shared resource with restricted deletion permissions. Object is currently in use or referenced by an active program or task.

How do I fix KUKA Robot alarm KRC0406?

1. Verify the write-protection status of the object in the file manager or file properties dialog 2. Disable write-protection by right-clicking the file, selecting Properties, and unchecking the write-protect option 3. Confirm that your user account has appropriate permissions and access level to delete objects in that directory 4. Check if the object is currently being used by an active program or task and stop execution if necessary 5. If the object is on a network drive or shared resource, verify permissions are set to allow deletion 6. Attempt deletion again after modifications; if the alarm persists, consult KUKA system administrator for protected system files

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC0406

KUKA Robot KRC0406 - <object> CANNOT BE DELETED

This alarm indicates an attempt to delete a file or object that is protected by write-protection settings on the KUKA KRC controller. The object cannot be removed until its protection status is modified. This safety feature prevents accidental or unauthorized deletion of critical system files, programs, or configurations.

KUKA RobotSystemBasic

KRC0406

KUKA Robot KRC0406 - <object> CANNOT BE DELETED

Common Causes

File or object has write-protection flag enabled in file properties
Insufficient user access privileges or permission level to delete protected objects
System or kernel files that are permanently protected by the controller
Network drive or shared resource with restricted deletion permissions
Object is currently in use or referenced by an active program or task

Troubleshooting Steps

1Verify the write-protection status of the object in the file manager or file properties dialog
2Disable write-protection by right-clicking the file, selecting Properties, and unchecking the write-protect option
3Confirm that your user account has appropriate permissions and access level to delete objects in that directory
4Check if the object is currently being used by an active program or task and stop execution if necessary
5If the object is on a network drive or shared resource, verify permissions are set to allow deletion
6Attempt deletion again after modifications; if the alarm persists, consult KUKA system administrator for protected system files

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