# Invalid File... library has already been installed, but can't find the HTTP Requests library

**URL:** <https://discourse.processing.org/t/invalid-file-library-has-already-been-installed-but-cant-find-the-http-requests-library/32300>\
**Category:** Processing for Android\
**Created:** [September 18, 2021, 5:43am UTC](https://discourse.processing.org/t/invalid-file-library-has-already-been-installed-but-cant-find-the-http-requests-library/32300 "2021-09-18T05:43:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bigboss97](https://avatars.discourse-cdn.com/v4/letter/b/47e85d/32.png) [@bigboss97](https://discourse.processing.org/u/bigboss97)\
**Post date:** [September 18, 2021, 5:43am UTC](https://discourse.processing.org/t/invalid-file-library-has-already-been-installed-but-cant-find-the-http-requests-library/32300/1 "2021-09-18T05:43:51Z")

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I’m using Processing 3.5.4 on Windows 10. I’ve created a script using HTTP Requests library. Everything works fine.  
Now I’m trying to run the script on my Android phone with APDE v0.5.1. When I tried to install compressed library ([Releases · runemadsen/HTTP-Requests-for-Processing · GitHub](https://github.com/runemadsen/HTTProcessing/releases)) I got:  
Invalid File, The requested library has already been installed

but I can’t see any library in the manager. I have tried to uninstall the app. It’s still saying library already installed. Any ideas what I can do?

thanks,  
Phuoc

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**Author:** ![bigboss97](https://avatars.discourse-cdn.com/v4/letter/b/47e85d/32.png) [@bigboss97](https://discourse.processing.org/u/bigboss97)\
**Post date:** [September 19, 2021, 11:59am UTC](https://discourse.processing.org/t/invalid-file-library-has-already-been-installed-but-cant-find-the-http-requests-library/32300/2 "2021-09-19T11:59:38Z")

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I just noticed that uninstall of the app doesn’t remove the files under the Sketchbook/libraries directory. After removing the files, I was able to install the library. I’m facing now other error issues. But at least it’s progressing.