# Calibration Errors

**URL:** <https://www.evolver.bio/t/calibration-errors/509>\
**Category:** Software\
**Created:** [February 8, 2024, 7:06pm UTC](https://www.evolver.bio/t/calibration-errors/509 "2024-02-08T19:06:13Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![William](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@William](https://www.evolver.bio/u/William)\
**Post date:** [February 8, 2024, 7:06pm UTC](https://www.evolver.bio/t/calibration-errors/509/1 "2024-02-08T19:06:13Z")

</div>

I am trying to calibrate the eVOLVER and have run into an issue when calibrating the OD and the temperature, but not the pumps, through the GUI. I have attached the error message I receive when I go to run the calibration. Does anyone have recommendations for fixing this issue? (I am running this on a Windows computer)  
 ![error2](https://canada1.discourse-cdn.com/flex035/uploads/evolver/original/1X/a82c12d08838f6d56bec73dd810f4abf9c146068.png)

---

<div class="post-metadata">

**Author:** ![William](https://avatars.discourse-cdn.com/v4/letter/w/b19c9b/32.png) [@William](https://www.evolver.bio/u/William)\
**Post date:** [February 9, 2024, 10:38pm UTC](https://www.evolver.bio/t/calibration-errors/509/2 "2024-02-09T22:38:47Z")

</div>

I found the source of this error. I had activated the virtual environment not within the dpu folder. This is clearly stated in the dpu installation, and was a silly mistake on my part. I just moved the venv folder into the dpu folder and this seems to be fixed. Hopefully this post will save someone else also new to coding a little bit of a headache.