Memory-Access on ErrorVault — Developer Error Code Dictionary

Fix clw-memory-not-found: Memory Block Not Found in OpenClaw

Sun, 14 Jun 2026 15:08:04 +0800

1. Symptoms

When the `clw-memory-not-found` error occurs, the OpenClaw runtime halts execution and throws an exception that typically looks like this:

[ERROR] clw-memory-not-found: Failed to locate memory block at address 0x7f3a2b1c0040 at function: clw_buffer_read at module: libopenclaw.so.2.1.0 call stack: -> read_buffer_impl (buffer.c:234) -> parse_frame (parser.c:89) -> main (app.c:45)


Common symptoms that precede or accompany this error include:

- **Sudden program crash** with no previous warning signs
- **Inconsistent state** where some operations succeed while others fail
- **Garbage or null values** being returned from previously working functions
- **Valgrind or sanitizers reporting** "Invalid read of size X" errors before the crash
- **Double-free corruption** errors appearing in logs

Developers often report that the error occurs during normal operations even though no explicit memory management calls were made in their own code, suggesting the issue originates from library internals or threading race conditions.

## 2. Root Cause

The `clw-memory-not-found` error indicates that OpenClaw attempted to dereference a memory pointer that no longer references valid, allocated memory. This typically happens for one of the following reasons:

**1. Premature Memory Deallocation**

The most frequent cause is a memory block being freed or returned to the pool before OpenClaw finished using it. This creates a "dangling pointer" scenario where the pointer still exists in the code but the underlying memory has been reclaimed.

**2. Stack-Scoped Memory Pass-by-Value**

When a developer passes a stack-allocated buffer to an OpenClaw function, the memory becomes invalid once the function scope exits. OpenClaw may hold a reference to this memory and attempt to access it later, triggering the error.

```c
void process_data() {
    char local_buffer[256];
    clw_buffer_init(&local_buffer, 256);  // Copies pointer to internal state
    
    // local_buffer goes out of scope here
}  // clw-memory-not-found occurs when internal cleanup tries to access local_buffer

3. Double-Free or Double-Deletion

Fix clw-gpu-crash: GPU Memory Segmentation Fault in OpenClaw Compute Workloads

Fri, 05 Jun 2026 03:08:04 +0800

1. Symptoms

The clw-gpu-crash error occurs when an OpenClaw compute workload encounters a critical failure at the GPU level. This manifests as an abrupt termination of the GPU computation process, often leaving the device in an undefined state.

Observable Symptoms

The most common symptoms reported by developers include:

Sudden process termination: The OpenClaw worker process exits with a non-zero exit code immediately after launching GPU kernels.
Device becomes unresponsive: After the crash, subsequent GPU operations return CL_DEVICE_NOT_AVAILABLE or similar errors until the device is reset.
dmesg kernel errors: On Linux systems, the kernel ring buffer may contain entries indicating GPU memory access violations:

[  123.456789] NVRM: Xid (PCI:0000:01:00): GPU Crash, reason: GF100
[  123.456890] NVRM: Xid (PCI:0000:01:00): GPU memory access violation at address 0x12345678
[  123.456891] NVRM: Xid (PCI:0000:01:00):   - GPU 0000:01:00.0: GPU has fallen off the bus

Error log output: The OpenClaw runtime emits the following error message:

[ERROR] OpenClaw Worker: clw-gpu-crash detected
[ERROR]   Device: NVIDIA Tesla T4 (ID: 0)
[ERROR]   Workload: matrix_multiply_v2.clw
[ERROR]   Crash type: GPU_MEMORY_SEGFAULT
[ERROR]   Context dump saved to: /var/log/openclaw/crash_20241230_143255.dmp

Partial results: In some cases, the GPU may have completed a portion of the workload before crashing, leaving partial output in device memory.
Timeout behavior: If Watchdog timers are enabled, the system may report a kernel execution timeout before the crash is officially detected.

Secondary Symptoms

After a clw-gpu-crash, you may observe:

Fix clw-memory-denied: Memory Access Denied by OpenClaw Security Policy

Fri, 29 May 2026 22:20:04 +0800

1. Symptoms

When the clw-memory-denied error occurs, OpenClaw aborts execution and emits a diagnostic message identifying the denied memory operation. Developers typically encounter this error during plugin development, sandboxed execution, or when attempting to access protected memory regions.

Common Symptom Patterns

The error manifests in several observable ways:

Terminal Output:

[OpenClaw v2.4.1] ERROR: clw-memory-denied Attempted access to protected memory region at 0x7fff5a3c0000 Operation: read Required permission: clw_mem_read Current session permissions: clw_mem_none Sandbox policy: strict Process: plugin-fetcher (PID 12847)

Memory-Access on ErrorVault — Developer Error Code Dictionary

Fix clw-memory-not-found: Memory Block Not Found in OpenClaw

1. Symptoms

When the clw-memory-not-found error occurs, the OpenClaw runtime halts execution and throws an exception that typically looks like this:

Fix clw-gpu-crash: GPU Memory Segmentation Fault in OpenClaw Compute Workloads

1. Symptoms

Observable Symptoms

Secondary Symptoms

Fix clw-memory-denied: Memory Access Denied by OpenClaw Security Policy

1. Symptoms

Common Symptom Patterns

Terminal Output:

When the `clw-memory-not-found` error occurs, the OpenClaw runtime halts execution and throws an exception that typically looks like this: