Are you dealing with the expression.syntaxerror: token eof expected error message in your code?
This error message is commonly seen in programming languages like Python and JavaScript.
In this article, we will help you understand what this error is all about and how to resolve it.
Continue to read on to find step-by-step solutions to get rid of the expression.syntaxerror token eof expected error message.
What is “expression.syntaxerror: token eof expected”?
The expression.syntaxerror: token eof expected is an error message that can occur in Power Query.
It usually occurs when an invalid function name is used or it uses the wrong case (for instance, “if” is a valid command, while “If” with an upper case “I” is not).
In simple words, the token eof expected usually occurs when an invalid function name is used, or it uses the wrong case.
Why does “expression.syntaxerror: token eof expected” error message occur?
This error message occurs due to several factors, such as:
👉 Forget to include a closing bracket or parenthesis in your code. This can lead you to an incomplete expression and trigger the error.
👉 Leaving a string or comment open without closing it.
👉 Forgetting to add a semicolon at the end of a statement can result in a syntax error.
How to fix “expression.syntaxerror: token eof expected”?
To fix the expression.syntaxerror: token eof expected error message in Power Query.
Here are some ways to fix this error:
- Check if an invalid function name is used or if it uses the wrong case, as we mentioned above (if is a valid command, while If with an upper case, I is not).
Incorrect code:
let
Source = "Hi, welcome to itsourcecode",
Result = If(Source = "Hi, welcome to itsourcecode", "Yes", "No")
in
ResultCorrected code:
let
Source = "Hi, welcome to itsourcecode",
Result = if(Source = "Hi, welcome to itsourcecode", "Yes", "No")
in
Result- Ensure you have a good understanding of how Power Query works.
Incorrect code:
let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
Result = Table.AddColumn(Source, "Custom", each [Column1] + [Column2])
in
Result
Corrected code:
let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
Result = Table.AddColumn(Source, "Custom", each [Column1] + [Column2])
in
Result- If you’re using Custom Columns, check the syntax check at the bottom of the screen to help guide you with formulas.
Incorrect code:
Custom Column formula: [Column1] + [Column2
Corrected code:
Column formula: [Column1] + [Column2]
- You can also check if there are any errors in the M code or if there is a lack of understanding of how Power Query works.
Note: Note: The Power Query IF, THEN, and IF ELSE statements are case-sensitive and they require lower-case. You should change “if,” “then,” and “else” in lowercase.
Conclusion
In conclusion, the expression.syntaxerror: token eof expected is an error message that can occur in Power Query.
It usually occurs when an invalid function name is used or it uses the wrong case (for instance, “if” is a valid command, while “If” with an upper case “I” is not).
This article already provides solutions to fix this error message. By executing the solutions above, you can master this SyntaxError with the help of this guide.
You could also check out other SyntaxError articles that may help you in the future if you encounter them.
- Syntaxerror: cannot use ‘import.meta’ outside a module
- Uncaught syntaxerror invalid left-hand side in assignment
- Syntaxerror: multiple exception types must be parenthesized
We are hoping that this article helps you fix the error. Thank you for reading itsourcecoders 😊
Python SyntaxError debugging checklist
- Read the caret. Python points exactly at the character it choked on.
- Check the line above too. Missing brackets/quotes propagate down and the error line is often the line AFTER the actual problem.
- Look for missing colons.
if xwithout:raises SyntaxError. - Check quote balance. Unclosed string literal is common.
- Use ruff –check . to lint the whole file for syntax issues at once.
Common SyntaxError sources
- Missing colon after if/for/while/def/class.
- Unclosed brackets/parens/quotes. Python 3.10+ shows precise “was never closed” messages.
- Indentation issues. Mixed tabs and spaces.
- Python 2 syntax. print statement, except comma syntax.
- Wrong assignment target. = instead of ==, assign to literals.
Modern tooling to prevent SyntaxError
- Ruff. Fast linter that catches syntax + style issues in one pass.
- Pyright / mypy. Static type checkers flag syntax + type issues.
- VS Code + Pylance. Real-time syntax feedback while typing.
- Python 3.11+ error messages. Dramatically clearer than earlier versions.
- Black or ruff format. Auto-formatting exposes broken structure.
Official documentation
Frequently Asked Questions
What is Python SyntaxError and what causes it?
SyntaxError is raised when Python’s parser can’t understand your code. Common causes: missing colon (def foo() instead of def foo():), unmatched parentheses or brackets, incorrect indentation, mixing tabs and spaces, missing comma in a list, or using a Python 3 feature in a Python 2 interpreter (or vice versa). The error points to a line, but the actual issue is often on the line BEFORE.
How do I fix ‘unexpected EOF while parsing’?
Python ran out of code while expecting more, usually unclosed parenthesis, bracket, brace, or quote. Scroll up from the error line and count opening vs closing pairs. Use an IDE with bracket matching (VS Code, PyCharm) to highlight pairs. Common gotcha: a triple-quoted string that’s missing its closing triple-quote.
Why does my syntax error point to a line that looks correct?
The actual error is often on the line BEFORE the one Python reports. Python reads code until something doesn’t parse, then reports the position where it gave up, not where the user’s mistake started. Check the line above the reported error for missing colons, commas, or closing brackets.
Why does ‘print x’ raise SyntaxError in Python 3?
Python 3 made print a function, so print(x) is required. The bare ‘print x’ syntax was Python 2 only. If you’re following an old tutorial, check whether it targets Python 2 (released 2008) or Python 3 (your current interpreter). Update all print statements to print(…) function calls.
Where can I find more SyntaxError fixes?
Browse the SyntaxError reference hub for 48+ specific fixes (Python and JavaScript). For Python fundamentals see the Python Tutorial hub. For JavaScript syntax errors see the JavaScript Tutorial hub.
Caren Bautista
Technical Writer at PIES IT Solution
Responsible for crafting clear, well-structured, and beginner-friendly content across the platform. Handles the writing, proofreading, and editorial review of tutorials, guides, and documentation to ensure every article is accurate, readable, and easy to follow.
Expertise: Technical Writing · Content Creation · Documentation · Editorial Writing · JavaScript · TypeScript · Python · Python Errors · HTTP Errors · MS Excel
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