#CONNECT!Excel error guide No upload

#CONNECT! in Excel — Data connection failed

#CONNECT! means Excel could not connect to the source behind a linked data type or query. Check the connection, credentials, network and source availability.

Reviewed 31 October 2026 Tested in Excel 365; fixes apply to 2021, 2024 and Mac where the feature exists

The short answer

#CONNECT! means Excel could not connect to the source behind a linked data type or query. Check the connection, credentials, network and source availability.

What it looks like

A data type or query shows #CONNECT!
Refresh All produces an error
The workbook works offline but not on the corporate network

Why #CONNECT! happens

The external source is offline or has moved.
Credentials have expired or the account lacks permission.
A firewall, VPN or proxy is blocking the connection.
The query uses a path that no longer exists.

How to fix #CONNECT!

1
Test the source outside Excel
Open the source URL, database or file directly. If it does not work there, fix the source or network first.
2
Re-enter credentials
Open Data → Queries & Connections → Properties → Credentials and update the sign-in. Then refresh.
3
Check the query path
If a file or folder moved, update the source path in Power Query. Use a parameter for paths that change between environments.

Check it in your own workbook

Paste the formula into the free browser tools to see the exact fix without uploading your file. The Error Fixer explains the code, the Formula Checker finds syntax problems, and the Formula Explainer breaks down nested logic.

Open the interactive Error Fixer Check a formula

Related functions

IFERROR

Frequently asked questions

What does #CONNECT! mean in Excel?

#CONNECT! means Excel could not connect to the source behind a linked data type or query. Check the connection, credentials, network and source availability.

How do I fix #CONNECT! in Excel?

Test the source outside Excel: Open the source URL, database or file directly. If it does not work there, fix the source or network first. Re-enter credentials: Open Data → Queries & Connections → Properties → Credentials and update the sign-in. Then refresh.

Why does #CONNECT! appear only in some rows?

Usually because only some rows contain the trigger: The external source is offline or has moved. Credentials have expired or the account lacks permission. A firewall, VPN or proxy is blocking the connection.

How can I stop #CONNECT! from appearing again?

Fix the underlying reference or data type, then test the formula on a copy of the sheet before filling it down.

Related Excel error guides

All error codes →

#VALUE!Wrong value type#VALUE! means Excel expected a number, date or logical value but found text, an empty cell or a value from another data type. The fix is to convert the input, remove hidden characters, or guard the calculation with IFERROR.#REF!Broken cell reference#REF! means a formula points to a cell, row, column or sheet that no longer exists. It usually appears after deleting rows or columns, moving a sheet, or pasting a formula into a workbook that does not contain the referenced sheet.#N/ALookup value not found#N/A means a lookup or match function could not find the value. The value may be missing, spelled differently, stored as text instead of a number, or surrounded by spaces. Use exact-match mode and return a clear fallback.#DIV/0!Division by zero#DIV/0! appears when a formula divides by zero or by an empty cell. Excel treats a blank denominator as zero. Check the denominator, exclude blank rows, or return a controlled blank with IFERROR.

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What it looks like

Why #CONNECT! happens

How to fix #CONNECT!

Test the source outside Excel

Re-enter credentials

Check the query path

Check it in your own workbook

Related functions

Frequently asked questions

Related Excel error guides

Send the workbook and get the formula fixed

What it looks like

Why #CONNECT! happens

How to fix #CONNECT!

Test the source outside Excel

Re-enter credentials

Check the query path

Check it in your own workbook

Related functions

Frequently asked questions

Related Excel error guides

Send the workbook and get the formula fixed