CS2002

error name is already declared in this block (line line).

#What it means

A name is declared twice in the same block. The message gives the line of the first declaration.

#Typical cause

• const x = ... or let x = ... written twice where the second should change the value: write x = ... without let to change a variable.
• Two parameters, fields or enum items with the same name.
• A local name that is the same as a name brought in by import { … }.

#How to fix it

Change the existing variable with x = ... (declare it with let so it can change), or pick a different name for the second one. See Variables.

#Example

//@chartscript 1
indicator("Length")
const len = 14
const len = 20
plot(ta.sma(close, len))

Fixed

//@chartscript 1
indicator("Length")
let len = 14
len = 20
plot(ta.sma(close, len))

#Related

• CS2402 — This declares a new name that hides the one from line line; did you mean to change it with op ?
• CS2401 — name is not declared; declare it with decl before assigning to it.