# Error naming a module **URL:** \ **Category:** App Development\ **Tags:** features and bugs\ **Created:** [August 9, 2021, 2:50pm UTC](https://forum.canton.network/t/error-naming-a-module/2959 "2021-08-09T14:50:42Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Dave](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/dave/32/7311_2.png) [@Dave](https://forum.canton.network/u/Dave)\ **Post date:** [August 9, 2021, 2:50pm UTC](https://forum.canton.network/t/error-naming-a-module/2959/1 "2021-08-09T14:50:42Z")
Hey, I named my file ‘chore.daml’ then named my module ‘Chore’ and the IDE showed the error below: ‘Module names should always match file names, as per documentation. Please change the filename to Chore.daml.’ Instead of changing the file name to ‘Chore.daml’ I changed the module name to ‘chore’ however it then showed the following error: “parse error on input ‘chore’” I assumed that the module name (and therefore the file name) must be capitalised however, I searched the documentation and found the [file structure page here](https://docs.daml.com/daml/reference/file-structure.html) which supports the first error message that the file and module names must be the same however, it doesn’t state that they must both be capitalised. I found this question and I tried to close the tabs & VS which didn’t work - [How to fix incorrect module name errors in Daml Studio?](https://discuss.daml.com/t/how-to-fix-incorrect-module-name-errors-in-daml-studio/2186). My issue also isn’t that I renamed a file so I don’t know how much it applies. Any help on how to resolve this is much appreciated. Thanks, Dave ---
**Author:** ![Gary\_Verhaegen](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/gary_verhaegen/32/81_2.png) [@Gary\_Verhaegen](https://forum.canton.network/u/Gary_Verhaegen)\ **Post date:** [August 9, 2021, 2:56pm UTC](https://forum.canton.network/t/error-naming-a-module/2959/2 "2021-08-09T14:56:28Z")
Module names (and type names) must start with an uppercase letter. If that’s not documented, it definitely should be. ---
**Author:** ![quidagis](https://avatars.discourse-cdn.com/v4/letter/q/dbc845/32.png) [@quidagis](https://forum.canton.network/u/quidagis)\ **Post date:** [August 9, 2021, 11:56pm UTC](https://forum.canton.network/t/error-naming-a-module/2959/3 "2021-08-09T23:56:57Z")
Agree, it is in there but you _have_ to look for it, and the most relevant reference `2.2.2.1 Template name` is actually broken across 2 pages in the .PDF which makes it easy to miss. Searched the DA\_SDK.pdf using the following terms: - capital - module capital - template capital - module uppercase - module capitaliZ/Se Search results below. 2.2.10.1 File structure > This file’s module name (module NameOfThisFile where). > Part of a hierarchical module system to facilitate code reuse. **Must be the same as the Daml file name** , without the file extension. > For a file with path ./Scenarios/Demo.daml, use module Scenarios.Demo where. Understand the generated classes (Page 377/577) > The **Java package for the generated classes** is the **equivalent of the lowercase Daml module name** Develop with Daml Studio (Page 393/577) > The first **two lines specify language version and module name** 2.2.1.2 Choice structure (Page 111/577) > a name **Must begin with a capital letter**. Must be unique - choices in different templates can’t have the same name 2.2.2.1 Template name (Pages 112-113/577) > This is the name of the template. It’s preceded by template keyword. **Must begin with a capital letter**. This is the highest level of nesting. As far as `Type` requiring a `CAPITAL` I did not see it. Searched using: - type name - type capital - type uppercase - type capitaliZ/Se Should be clearer? Yes. I’d suggest a definitions of TERMs, perhaps as an Appendix that details these specific requirements.