EC
59
MongoDBERRORCommonQuery ErrorHIGH confidence

The specified command does not exist

What this means

This error indicates that the database command you are trying to run does not exist. It is most often caused by a typo in the command name or by attempting to run a command that is not supported by your MongoDB version.

Why it happens
  1. 1A typo in a command name, such as `findandmodify` instead of `findAndModify`
  2. 2Attempting to run a command that was introduced in a newer version of MongoDB than you are using
  3. 3Trying to run a command that has been deprecated and removed in your version of MongoDB
  4. 4Incorrectly formatting a `db.runCommand()` call
How to reproduce

A `runCommand` call is made with a typo in the command name.

trigger — this will error
trigger — this will error
// The command is 'hello', not 'helo'.
db.runCommand({ helo: 1 })

expected output

MongoServerError: no such command: 'helo'

Fix 1

Correct the Command Name

WHEN The error is a simple typo.

Correct the Command Name
// Corrected command
db.runCommand({ hello: 1 })

Why this works

Check the spelling of the command against the official MongoDB documentation for your server version. Command names are case-sensitive.

Fix 2

Verify MongoDB Version Compatibility

WHEN You are using a new or old command.

Verify MongoDB Version Compatibility
// Check the server version
db.version()

Why this works

Consult the MongoDB documentation for the specific command to see its version history. Ensure the command is available in the version of the `mongod` server you are connected to.

What not to do

✕ Wrap the command in a try/catch block and ignore the error

The command is not executing, so ignoring the error means your application is not performing its intended function. This hides a fundamental bug.

Sources
Official documentation ↗

mongodb/mongo src/mongo/base/error_codes.yml

Database Commands ↗

Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev

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