# ValueError: path is on mount 'D:', start on mount 'C:'

**URL:** <https://openep.discourse.group/t/valueerror-path-is-on-mount-d-start-on-mount-c/73>\
**Category:** Uncategorized\
**Created:** [31 May 2023 15:51 UTC](https://openep.discourse.group/t/valueerror-path-is-on-mount-d-start-on-mount-c/73 "2023-05-31T15:51:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nbodagh](https://avatars.discourse-cdn.com/v4/letter/n/cc9497/32.png) [@nbodagh](https://openep.discourse.group/u/nbodagh)\
**Post date:** [31 May 2023 15:51 UTC](https://openep.discourse.group/t/valueerror-path-is-on-mount-d-start-on-mount-c/73/1 "2023-05-31T15:51:27Z")

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Hi, I’m trying to open files on OpenEP from my D drive. Unfortunately, it gives me an error when I do this.

ValueError: path is on mount ‘D:’, start on mount ‘C:’

When I move the folder with the maps to my C drive I’m able to load it up. Does anyone know why this happens/how to remedy it?

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**Author:** ![steven.williams](https://yyz2.discourse-cdn.com/free1/user_avatar/openep.discourse.group/steven.williams/32/6_2.png) [@steven.williams](https://openep.discourse.group/u/steven.williams)\
**Post date:** [6 September 2023 15:43 UTC](https://openep.discourse.group/t/valueerror-path-is-on-mount-d-start-on-mount-c/73/2 "2023-09-06T15:43:44Z")

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Hi Neil, we have not done much debugging using different drives so for now it is probably worth keeping the data and code all on the same drive