Runtime-Error on ErrorVault — Developer Error Code Dictionary

Fix clw-fs-failure: OpenClaw Filesystem Operation Failure

Tue, 04 Aug 2026 10:20:04 +0800

1. Symptoms

When clw-fs-failure occurs during OpenClaw execution, you will observe distinctive indicators in your development environment and terminal output. The error typically manifests when OpenClaw attempts to read from or write to the filesystem, and the underlying I/O operation fails for reasons beyond simple permission problems.

Typical Error Output:

[OPENCLAW] FATAL: clw-fs-failure
[OPENCLAW] Operation: write
[OPENCLAW] Target: /var/lib/openclaw/cache/pipeline.lock
[OPENCLAW] Reason: No space left on device
[OPENCLAW] Stack trace:
    at FilesystemService.write() [openclaw-core/fs.js:142]
    at PipelineManager.commit() [openclaw-core/pipeline.js:89]
    at CommandExecutor.run() [openclaw-core/executor.js:67]

Visible Symptoms in Your Environment:

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-sandbox-crash: OpenClaw Sandbox Process Terminated Unexpectedly

Wed, 27 May 2026 10:20:04 +0800

1. Symptoms

The clw-sandbox-crash error occurs when OpenClaw’s sandboxed execution environment terminates abnormally during code execution. This error manifests through several observable symptoms that help distinguish it from other OpenClaw runtime failures.

Primary Symptoms:

When this error occurs, developers typically observe the following in their terminal or application logs:

[OpenClaw] ERROR: Sandbox process terminated unexpectedly
[OpenClaw] ERROR: Exit code: <signal_number>
[OpenClaw] ERROR: Crash dump available at: /tmp/openclaw/crashdump_<timestamp>.dmp

The error code displayed is clw-sandbox-crash, often accompanied by a specific signal identifier such as SIGSEGV, SIGABRT, or SIGKILL. Developers may also notice that:

Runtime-Error on ErrorVault — Developer Error Code Dictionary

Fix clw-fs-failure: OpenClaw Filesystem Operation Failure

1. Symptoms

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-sandbox-crash: OpenClaw Sandbox Process Terminated Unexpectedly

1. Symptoms

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