What are the expressions DLL generated by UiPath in main project folder?

[tejaskumar.darji]

Hi Team

I noticed that publishing in UiPath generates DLL files within the Main project folder. Could you please clarify their purpose?
The presence of these files makes the project directory look quite cluttered. Are they necessary to keep, or can they be safely deleted?

I also observed that even after deletion, these DLLs are regenerated upon publishing, which adds to the mess. It should be generated in temp folder isnt it?

Looking forward to your guidance on this.

Thanks!

[singh_sumit (Sumit Singh Tariyal)]

Hey @tejaskumar.darji hope this link help you

Exoressions dll at root folder

Hi The files that you are seeing are temporary files that are created by UiPath Studio. They are not necessary for the project to work, and you can safely delete them. The Expresions_xxxxxxxx.dll files are created when you use expressions in your UiPath Studio project. The GlobalVariablesT1PNoYwrqg.dll file is created when you use global variables in your UiPath Studio project. The JSON files that you are seeing are created when you publish your UiPath Studio project. They are used to store t…

cheers

[tejaskumar.darji]

Okay, but what’s the purpose of saving those temp files in the main folder? Any idea why the tool stores them there, requiring developers to manually delete them after each publish? Seems strange!

[postwick (Paul Ostwick)]

If they’re not disappearing after you publish, something is wrong. They shouldn’t still be there after you complete the publishing process.

[tejaskumar.darji]

Those files still remain there after publishing, and it’s not just happening for me — I checked with several other developers who are also noticing the same issue. That’s why I had to raise it here to understand if there’s an intended purpose behind these temporary files. What might be the reason for saving them in the main folder? Also, it’s not just a few DLLs — there are around 10 to 15 DLL files.