# Error when running RF test in Azure DevOps pipeline **URL:** \ **Category:** Tools\ **Created:** [9 November 2023 23:04 UTC](https://forum.robotframework.org/t/error-when-running-rf-test-in-azure-devops-pipeline/6453 "2023-11-09T23:04:11Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![damies13](https://dub1.discourse-cdn.com/flex005/user_avatar/forum.robotframework.org/damies13/32/623_2.png) [@damies13](https://forum.robotframework.org/u/damies13)\ **Post date:** [11 November 2023 02:49 UTC](https://forum.robotframework.org/t/error-when-running-rf-test-in-azure-devops-pipeline/6453/4 "2023-11-11T02:49:38Z")
Hi @vdavis345 , > [@vdavis345](#): > > can you suggest me a library that can manipulate file explorer? by selecting a file and opening it or uploading ? Does it need to be done via file explorer (windows gui?) or can the files just be manipulated directly at the OS level (much easier)? If the files just be manipulated directly at the OS level, [OperatingSystem](https://robotframework.org/robotframework/latest/libraries/OperatingSystem.html) has keywords for manipulating local files and folders, create, edit, rename, delete etc As for uploading, that will depend on what the upload process is, [POST](https://marketsquare.github.io/robotframework-requests/doc/RequestsLibrary.html#POST) from [RequestsLibrary](https://marketsquare.github.io/robotframework-requests/doc/RequestsLibrary.html) will let you upload to a web server, likewise [Send Cmd](https://kowalpy.github.io/Robot-Framework-FTP-Library/FtpLibrary.html#Send%20Cmd) from [FtpLibrary](https://kowalpy.github.io/Robot-Framework-FTP-Library/FtpLibrary.html) will let you upload via ftp, there are numerous other methods for “uploading” knowing which you need will determine which library to use. Hope that helps, Dave. --- _[View the full topic](https://forum.robotframework.org/t/error-when-running-rf-test-in-azure-devops-pipeline/6453)._