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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 that they mean and how to solve them:

Alignment


Missing Math mode characters


References

Labeling

Float specifiers


Undefined control sequences

File not found:



Missing number/illegal units of measure:

Environment undefined (missing package):


Other:

Overleaf guides

LaTeX Basics

Mathematics

Figures and tables

References and Citations

Languages

Document structure

Formatting

Fonts

Presentations

Commands

Field specific

Class files

Advanced TeX/LaTeX