# Syntax error: 'invalid interpolation syntax' when using include()
**URL:** https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732
**Category:** New to Julia
**Tags:** question, strings, error, string-interpolation
**Created:** [January 2, 2021, 10:28am UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732 "2021-01-02T10:28:39Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@MattWillFlood](https://discourse.julialang.org/u/MattWillFlood)
#### Post date: [January 2, 2021, 10:28am UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732/1 "2021-01-02T10:28:39Z")
Hi Guys,
I’m new-ish to Julia and so far things have been great, but this syntax error has really stumped me. 🤷🏼♂️
Here’s the background.
- I have several files called \_Aa.jl, \_Bb.jl, and so on.
- Each one contains a module of the same name (\_Aa, \_Bb,…).
- I can import the modules in most cases with no trouble:
```julia
include("_Aa.jl")
Main._Aa
@isdefined _Aa
true
```
However, when I try to do this for a file called “\_MSEn.jl” the following error is thrown:
```julia
include("_MSEn.jl")
ERROR: syntax: invalid interpolation syntax
```
And the file definitely exists…
```julia
isfile("_MSEn.jl")
true
```
Could somebody please explain why this happens and/or what I have overlooked? 🙏 🙏
Thanks in advance! 🙂
---
### Author:  [@magister-ludi](https://discourse.julialang.org/u/magister-ludi)
#### Post date: [January 2, 2021, 12:48pm UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732/2 "2021-01-02T12:48:05Z")
It looks to me like you probably have a typo in the file. What does it contain? That error message suggests that you’ve got a string containing a `$` and Julia is trying to interpolate something incorrectly.
---
### Author:  [@MattWillFlood](https://discourse.julialang.org/u/MattWillFlood)
#### Post date: [January 2, 2021, 1:13pm UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732/3 "2021-01-02T13:13:43Z")
Thank you so much **magister-ludi**! 🙌🏼
That was the problem exactly.
I had misinterpreted the error as relating to the filename string (i.e. include(“_ **filename** _”)) as opposed to strings contained within the file…
Your help is really appreciated! 🙂 👍🏼
---
### Author:  [@magister-ludi](https://discourse.julialang.org/u/magister-ludi)
#### Post date: [January 2, 2021, 11:24pm UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732/4 "2021-01-02T23:24:45Z")
No worries. There are a lot of complaints about Julia’s error messages, but as with any language, it takes time and practice to be able to interpret them productively.
---
### Author:  [@Alexandre\_Bergel](https://discourse.julialang.org/u/Alexandre_Bergel)
#### Post date: [July 14, 2022, 10:19am UTC](https://discourse.julialang.org/t/syntax-error-invalid-interpolation-syntax-when-using-include/52732/5 "2022-07-14T10:19:24Z")
I bumped into the same error today. I was able to reproduce it with:
```julia
julia> println("$(1,2)")
ERROR: syntax: invalid interpolation syntax
Stacktrace:
[1] top-level scope
@ none:1
```
One way to avoid the error is simply adding parenthesis:
```julia
julia> println("$((1,2))")
(1, 2)
```