What causes KUKA Robot alarm KRC1020?

Excessive array or string declarations without proper deallocation. Memory leaks from repeated object instantiation in loops without cleanup. Insufficient heap memory allocation in the controller's system configuration. Recursive function calls creating deep stack frames without base case termination. Large data structures or buffers declared globally or in frequently-called routines.

How do I fix KUKA Robot alarm KRC1020?

1. Review the KRL source code of the named object for memory-intensive operations and optimize array/string usage 2. Check for infinite loops or uncontrolled recursion that continuously allocate memory without release 3. Verify heap memory settings in the KUKA controller configuration and increase if necessary via system parameters 4. Implement explicit memory cleanup using DEINIT() or equivalent deallocation statements after large object usage 5. Break large data structures into smaller chunks or implement dynamic resizing instead of pre-allocating maximum sizes 6. Recompile the KRL program and restart the controller to clear memory state, then monitor memory consumption during execution

KUKA Robot codes

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KUKA Robot Controller

System · Basic

Alarm KRC1020

KUKA Robot KRC1020 - <object name> NO DYNAMIC MEMORY AVAILABLE 2705

The KRL runtime environment has exhausted available dynamic memory while attempting to instantiate or execute the specified KRL program object (module, function, or variable). This occurs when memory allocation requests exceed the heap space reserved for dynamic objects during program execution.

KUKA RobotSystemBasic

KRC1020

KUKA Robot KRC1020 - <object name> NO DYNAMIC MEMORY AVAILABLE 2705

Common Causes

Excessive array or string declarations without proper deallocation
Memory leaks from repeated object instantiation in loops without cleanup
Insufficient heap memory allocation in the controller's system configuration
Recursive function calls creating deep stack frames without base case termination
Large data structures or buffers declared globally or in frequently-called routines

Troubleshooting Steps

1Review the KRL source code of the named object for memory-intensive operations and optimize array/string usage
2Check for infinite loops or uncontrolled recursion that continuously allocate memory without release
3Verify heap memory settings in the KUKA controller configuration and increase if necessary via system parameters
4Implement explicit memory cleanup using DEINIT() or equivalent deallocation statements after large object usage
5Break large data structures into smaller chunks or implement dynamic resizing instead of pre-allocating maximum sizes
6Recompile the KRL program and restart the controller to clear memory state, then monitor memory consumption during execution

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