Quick Reference — All Error Codes at a Glance | ErrorCode — Error Code Reference & Solutions

Quick Reference

This page lists all error codes covered on this site. Use your browser’s search (Ctrl+F) to find a specific code.

Windows Errors

Code	Description	Fix
0x80004005	Unspecified Error	Windows Update troubleshooter, SFC/DISM
0x80070005	Access Denied	Take ownership, permissions fix
0x80070002	File Not Found (Update)	Clear SoftwareDistribution cache
0x8000FFFF	Catastrophic Failure	wsreset.exe, re-register Store
DPC Watchdog Violation	BSOD	Update storage drivers, SSD firmware
IRQL_NOT_LESS_OR_EQUAL	BSOD	Update drivers, memory diagnostics

Linux Errors

Code	Name	Description	Fix
errno-1	EPERM	Operation not permitted	sudo, chmod, chown
errno-2	ENOENT	No such file or directory	Verify path, find command
errno-5	EIO	Input/output error	Check disk, fsck
errno-12	ENOMEM	Out of memory	Check free, add swap
errno-13	EACCES	Permission denied	chmod, check ACLs
errno-28	ENOSPC	No space left on device	df -h, find large files

macOS Errors

Code	Name	Description	Fix
-43	FNFErr	File not found	Reset Finder, Spotlight
-36	ioErr	Input/output error	Disk Utility First Aid
-50	paramErr	Parameter error	Check syntax, reset NVRAM

Python Errors

Error	Description	Fix
TypeError	Wrong type operation	Type conversion
ValueError	Invalid argument	Input validation
KeyError	Dict key not found	.get(), ‘in’ check
IndexError	List index out of range	Check len()
AttributeError	No attribute	hasattr(), type check
ImportError	Module not found	pip install, sys.path
IndentationError	Bad indentation	4 spaces, autopep8
SyntaxError	Invalid syntax	Check syntax
ZeroDivisionError	Division by zero	Validate divisor
FileNotFoundError	File not found	Check path, os.path.exists

C/C++ Errors

Error	Description	Fix
Segmentation Fault	Memory access violation	gdb, null checks, valgrind
malloc NULL	Memory allocation failed	Check return, free memory
Stack Overflow	Infinite recursion	Base case, iteration
std::out_of_range	Index out of range	.at(), check size()
std::bad_alloc	Allocation failed	try/catch, smart pointers

PHP Errors

Error	Description	Fix
Parse Error	Syntax error	Check syntax
Fatal Error	Uncaught error	Define functions, memory
Undefined Index	Array key missing	isset(), ?? operator

Java Errors

Error	Description	Fix
NullPointerException	Null reference	null check, Optional
ClassNotFoundException	Class not found	Check classpath
OutOfMemoryError	Heap space	-Xmx, fix leaks
ClassCastException	Wrong cast	instanceof, generics
StackOverflowError	Infinite recursion	Base case, -Xss

JavaScript/Node.js Errors

Error	Description	Fix
ReferenceError	Variable not defined	Declare variable
TypeError	Cannot read property	Optional chaining ?.
SyntaxError	Unexpected token	Check syntax
ENOENT	File not found	path.join(), __dirname
CORS Error	Cross-origin blocked	Server headers, proxy

Deprecated Functions

Function	Language	Replacement
ereg()	PHP	preg_match()
split()	PHP	explode()
each()	PHP	foreach
mysql_*	PHP	mysqli_* / PDO
create_function()	PHP	Anonymous functions
print statement	Python	print()
raw_input()	Python	input()
has_key()	Python	‘in’ operator
escape()/unescape()	JavaScript	encodeURI()
substr()	JavaScript	slice()
execCommand()	JavaScript	Clipboard API
Thread.stop()	Java	Thread.interrupt()
Date methods	Java	java.time API