Errors
LaTeX error messages can sometimes be tricky to understand and fix. We've put together a list of common errors below, along with more information about what they mean and how to solve them.
Alignment
Double subscript
Missing Math mode characters
References
Labeling
Float specifiers
Undefined control sequences
File not found
- File XXX not found on input line XXX."
- LaTeX Error: File XXX not found."
- Package pdftex.def Error: File XXX not found."
Missing number/illegal units of measure
Environment undefined (missing package)
- LaTeX Error: Environment tikzpicture undefined
- LaTeX Error: Environment theorem undefined
- LaTeX Error: Environment split undefined
- LaTeX Error: Environment minipage* undefined
- LaTeX Error: Environment maplelatex undefined
- LaTeX Error: Environment mapleinput undefined
- LaTeX Error: Environment maplegroup undefined
- LaTeX Error: Environment flalign undefined
- LaTeX Error: Environment figure* undefined
- LaTeX Error: Environment comment undefined
- LaTeX Error: Environment biblio_lat undefined
- LaTeX Error: Environment align* undefined
- LaTeX Error: Environment align undefined
- LaTeX Error: Environment algorithm undefined
- LaTeX Error: Environment adjustbox undefined
Underfull and overfull boxes
Although these warnings are not errors we list them here for convenience:
Other
Overleaf guides
- Overleaf user documentation
- Overleaf group administration
- Overleaf Commons administration
- Overleaf on-premises
LaTeX basics
- Creating your first LaTeX document
- Paragraphs and new lines
- Bold, italics and underlining
- Lists
- Errors
Mathematics
- Mathematical expressions
- Subscripts and superscripts
- Brackets and Parentheses
- Matrices
- Fractions and Binomials
- Aligning equations
- Operators
- Spacing in math mode
- Integrals, sums and limits
- Display style in math mode
- List of Greek letters and math symbols
- Mathematical fonts
- Using the Symbol Palette in Overleaf
Figures and tables
- Tables
- Positioning Images and Tables
- Lists of Tables and Figures
- Drawing Diagrams Directly in LaTeX
- TikZ package
Document structure
- Sections and chapters
- Table of contents
- Cross referencing sections, equations and floats
- Indices
- Glossaries
- Nomenclatures
- Management in a large project
- Multi-file LaTeX projects
- Hyperlinks
Formatting
- Lengths in LaTeX
- Headers and footers
- Page numbering
- Paragraph formatting
- Line breaks and blank spaces
- Text alignment
- Page size and margins
- Single sided and double sided documents
- Multiple columns
- Counters
- Code listing
- Code Highlighting with minted
- Using colours in LaTeX
- Footnotes
- Margin notes
References and citations
- Bibliography management with bibtex
- Bibliography management with natbib
- Bibliography management with biblatex
- Bibtex bibliography styles
- Natbib bibliography styles
- Natbib citation styles
- Biblatex bibliography styles
- Biblatex citation styles
Fonts
Presentations
Commands
Languages
- Multilingual typesetting on Overleaf using polyglossia and fontspec
- Multilingual typesetting on Overleaf using babel and fontspec
- International language support
- Quotations and quotation marks
- Arabic
- Chinese
- French
- German
- Greek
- Italian
- Japanese
- Korean
- Portuguese
- Russian
- Spanish
Field specific
- Theorems and proofs
- Chemistry formulae
- Feynman diagrams
- Molecular orbital diagrams
- Chess notation
- Knitting patterns
- CircuiTikz package
- Pgfplots package
- Typesetting exams in LaTeX
- Attribute Value Matrices
Class files
- Understanding packages and class files
- List of packages and class files
- Writing your own package
- Writing your own class