Error map
UnicodeDecodeError UnicodeDecodeError: 'utf-8' codec can't decode byte 0x92 in position 10: invalid start byte
Python · layer 4, Application & API
Centre: this error. First ring: errors it is linked with (12). Outer ring: what those are linked with. Colours show the layer of a request each error belongs to. Click any dot to re-centre the map on it; hover to follow its connections. The centre dot opens the error page.
Directly related (12)
URIError: URI malformed
decodeURIComponent/decodeURI received an invalid percent-encoded sequence.
System.UnauthorizedAccessException: Access to the path 'x' is denied
The process’s identity can’t read/write that file or folder — IIS app pool identity, container user, read-only attribute, or a di…
UnicodeEncodeError: 'charmap' codec can't encode character '\u2192'
Python tried to write text in an encoding that can’t represent some characters — common in Windows consoles and files opened with…
java.io.FileNotFoundException: config.properties (No such file or directory)
Java couldn’t open the file — wrong path relative to the working directory, missing file, or a classpath resource read as a file.
Error 0x80070570: The file or directory is corrupted and unreadable
Windows can’t read a file because the disk, USB stick or installation media has corrupted data or bad sectors.
java.nio.file.AccessDeniedException: /path
The OS denied a file operation to the Java process.
PermissionError: [Errno 13] Permission denied: '/path'
The OS refused the file operation — no permission, a directory passed to open(), or (on Windows) the file is open elsewhere.
ERROR: invalid byte sequence for encoding "UTF8": 0x00
Text contained bytes invalid in UTF-8 — often a NUL byte (0x00) or Latin-1/Windows-1252 data.
FileNotFoundError: [Errno 2] No such file or directory: 'data.csv'
Python couldn’t find the file at that path — usually because relative paths resolve from the working directory, not the script.
No space left on device, but df shows free space (inodes exhausted)
The filesystem has run out of inodes — the slots for files — even though there are gigabytes free, usually because of millions of…
bash: /bin/rm: Argument list too long
A glob like * expanded to more file names than the kernel allows in one command (ARG_MAX), so the command never ran.
mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program
mount couldn’t mount the device — the filesystem type isn’t supported/installed, the partition is wrong, or the filesystem is dam…
Two steps away (36)
HTTP 404 Not Found
The server can’t find anything at the requested URL.
AbortError: The user aborted a request. / signal is aborted without reason
A fetch was cancelled through an AbortController (or the browser cancelled it).
TypeError: Failed to execute 'json' on 'Response': body stream already read
A fetch Response body was consumed twice (e.g. calling .text() then .json()).
npm ERR! code EACCES — permission denied
npm can’t write to a directory — usually global installs into a root-owned folder.
Error: ENOENT: no such file or directory
A file or directory the program tried to open doesn’t exist at that path.
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
The docker CLI can’t talk to the Docker engine — it isn’t running, or your user can’t access the socket.
AttributeError: 'X' object has no attribute 'y'
You accessed an attribute or method that doesn’t exist on that object type.
Unexpected characters at the top of the page / headers already sent by BOM
A UTF-8 byte-order mark (BOM) at the start of a PHP file is sent as output, breaking headers, JSON and images.
ConnectionRefusedError: [Errno 111] Connection refused
Nothing is listening on the host/port Python tried to connect to.
error: unable to create file x: Filename too long (Windows)
Windows’ 260-character path limit blocked Git from creating a file.
java.nio.file.NoSuchFileException: /path/file
An NIO Files operation targeted a path that doesn’t exist.
Error: EISDIR: illegal operation on a directory, read
A file API (readFile, writeFile, createReadStream) was given a directory path.
Blue Screen: MEMORY_MANAGEMENT (Stop code 0x0000001A)
Windows detected a severe memory-management error — commonly faulty RAM, unstable memory settings or a bad driver.
Error: ENOTDIR: not a directory
A path treats a file as if it were a directory (e.g. file.txt/child).
Error: EEXIST: file already exists, mkdir
Node tried to create a file/directory/symlink that already exists.
Linux: Permission denied
Your user (or the service user) lacks read/write/execute permission on a file, directory or one of its parents.
HTTP 403 Forbidden
The server understood the request but refuses to authorize it — you (or the server process) are not allowed to access this resour…
OAuth 2.0 Error: invalid_scope / insufficient_scope
The requested scope is unknown or not allowed for this client — or the token lacks the scope the API endpoint requires.
Error: EPERM: operation not permitted, rename / unlink
The OS refused a file operation — on Windows usually because another process (antivirus, editor, indexer) has the file locked.
PERMISSION_DENIED: The caller does not have permission (insufficient permissions)
You are authenticated, but your identity isn’t allowed to perform this action on this resource.
AccessControlListNotSupported: The bucket does not allow ACLs
The upload sets an ACL (like public-read), but the bucket uses “Bucket owner enforced” Object Ownership, which disables ACLs.
TypeError: x is not a function
You called something as a function, but its value is not a function (it’s undefined, a string, an object…).
TypeError: x is not a constructor
new was used with something that isn’t a class/constructor — usually a wrong import.
ReferenceError: Cannot access 'x' before initialization
A let/const/class was used before its declaration line ran (temporal dead zone) — often a circular import.
Warning: include(x.php): Failed to open stream: No such file or directory
PHP couldn’t open a file for include/require/fopen — wrong path, missing file, or no permission.
sqlite3.OperationalError: unable to open database file
SQLite couldn’t open or create the database file — wrong path or missing/unwritable directory.
0x80070020: The process cannot access the file because it is being used by another process
Another program has the file open (locked), so Windows can’t modify, delete or replace it.
no space left on device (Docker / Linux)
The disk (or inode table) is full — Docker images, build cache, logs and volumes are common culprits.
npm ERR! code ENOTEMPTY — ENOTEMPTY: directory not empty, rename
npm couldn’t rename a folder in node_modules because it wasn’t empty — usually a corrupted or concurrently modified node_modules.
Read-only file system (EROFS) — cannot write to disk
The filesystem is mounted read-only — often because the kernel remounted it after detecting disk errors.
bash: command not found
The shell can’t find an executable with that name in any directory on your PATH.
OCI runtime create failed: exec: "x": executable file not found in $PATH
The command you asked the container to run doesn’t exist inside the image — wrong command name, a shell that isn’t installed (bas…
umount: target is busy / Device or resource busy
The filesystem or device can’t be unmounted or removed because a process is still using it.
EC2 status check failed: Instance reachability check failed (1/2 checks passed)
AWS can reach the host, but the operating system inside the instance isn’t responding — kernel panic, full disk, broken network c…
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
The kernel booted but couldn’t mount the root filesystem — usually a missing or broken initramfs after a kernel update.
Too many levels of symbolic links (ELOOP)
A symlink points to itself, directly or through a chain, so path resolution loops.
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