Error map
wrong fs type, bad option, bad superblock mount: wrong fs type, bad option, bad superblock on /dev/sdb1, missing codepage or helper program
Linux · layer 6, Platform & cloud
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)
Error: ENOENT: no such file or directory
A file or directory the program tried to open doesn’t exist at that path.
sqlite3.OperationalError: unable to open database file
SQLite couldn’t open or create the database file — wrong path or missing/unwritable directory.
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…
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…
java.nio.file.AccessDeniedException: /path
The OS denied a file operation to the Java process.
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.
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x92 in position 10: invalid start byte
Python read bytes that aren’t valid in the encoding it assumed (usually UTF-8).
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.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.
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.
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.
Two steps away (34)
Error: Cannot find module 'x' (MODULE_NOT_FOUND)
Node can’t resolve the module path — the package isn’t installed, or a relative path/extension is wrong.
bash: command not found
The shell can’t find an executable with that name in any directory on your PATH.
Windows Error 0x80070002: The system cannot find the file specified
A file or registry entry Windows expected is missing — common in Windows Update, backups and app installs.
sqlite3.OperationalError: database is locked (SQLITE_BUSY)
Another connection holds a write lock on the SQLite file, and this one gave up waiting.
sqlite3.OperationalError: no such column: x
SQLite can’t find the column — missing migration, typo, or a string written in double quotes.
sqlite3.IntegrityError: FOREIGN KEY constraint failed
An insert/update/delete violated a foreign key in SQLite (with PRAGMA foreign_keys=ON).
An error occurred (UnauthorizedOperation): You are not authorized to perform this operation. Encoded authorization failure message: ...
The IAM identity is missing an EC2 (or related) permission. The encoded message tells you exactly which action and resource were…
InsufficientInstanceCapacity: We currently do not have sufficient capacity in the Availability Zone you requested
AWS has no free capacity for that instance type in that Availability Zone right now.
VcpuLimitExceeded: You have requested more vCPU capacity than your current vCPU limit
Your account’s On-Demand (or Spot) vCPU quota for that instance family and region is used up.
npm ERR! code EACCES — permission denied
npm can’t write to a directory — usually global installs into a root-owned folder.
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.
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.
Windows Error 0x80070005 (E_ACCESSDENIED): Access is denied
Windows refused an operation because the account or process lacks permission — seen in Windows Update, installers, Task Scheduler…
Error: ENOTDIR: not a directory
A path treats a file as if it were a directory (e.g. file.txt/child).
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.
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.
URIError: URI malformed
decodeURIComponent/decodeURI received an invalid percent-encoded sequence.
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.
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…
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: EEXIST: file already exists, mkdir
Node tried to create a file/directory/symlink that already exists.
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.
error: unable to create file x: Filename too long (Windows)
Windows’ 260-character path limit blocked Git from creating a file.
npm ERR! enoent ENOENT: no such file or directory, open '/path/package.json'
npm ran in a directory without a package.json.
npm ERR! code EROFS — EROFS: read-only file system
npm tried to write to a read-only location (read-only container filesystem, mounted volume, or system path).
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.
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.
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.
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.
passwd: Authentication token manipulation error
passwd couldn’t update the password — the root filesystem is read-only, /etc/shadow has wrong permissions/attributes, or a PAM ru…
Too many levels of symbolic links (ELOOP)
A symlink points to itself, directly or through a chain, so path resolution loops.
Map another error
Popular: 4035004000xC000007BTypeErrorCritical error404NullPointerException