# Library Compilation Process

**URL:** <https://forum.uipath.com/t/library-compilation-process/707181>\
**Category:** Studio\
**Tags:** bug, studio\
**Created:** [December 18, 2023, 11:50am UTC](https://forum.uipath.com/t/library-compilation-process/707181 "2023-12-18T11:50:48Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Ammaz\_Ahmed](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/ammaz_ahmed/32/404321_2.png) [@Ammaz\_Ahmed](https://forum.uipath.com/u/Ammaz_Ahmed)\
**Post date:** [December 18, 2023, 11:50am UTC](https://forum.uipath.com/t/library-compilation-process/707181/1 "2023-12-18T11:50:48Z")

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Hi , When we run our process its throws an error Compilation Failed

 ![image](https://global.discourse-cdn.com/uipath/original/4X/f/8/7/f873b77ff37a45365808c13701da2abb453c4fc3.png)

Please suggest me  
about this error

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**Author:** ![Mohan\_Reddy](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/mohan_reddy/32/443022_2.png) [@Mohan\_Reddy](https://forum.uipath.com/u/Mohan_Reddy)\
**Post date:** [December 18, 2023, 11:56am UTC](https://forum.uipath.com/t/library-compilation-process/707181/3 "2023-12-18T11:56:01Z")

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Hi @Ammaz_Ahmed ,

Please refer following thread. [“Unexpected error has occurred during the library compilation process: Exception has been thrown by the target of an invocation.” Error Output - Help / Studio - UiPath Community Forum](https://forum.uipath.com/t/unexpected-error-has-occurred-during-the-library-compilation-process-exception-has-been-thrown-by-the-target-of-an-invocation-error-output/557471)

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<div class="post-metadata">

**Author:** ![Ammaz\_Ahmed](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/ammaz_ahmed/32/404321_2.png) [@Ammaz\_Ahmed](https://forum.uipath.com/u/Ammaz_Ahmed)\
**Post date:** [December 18, 2023, 12:03pm UTC](https://forum.uipath.com/t/library-compilation-process/707181/4 "2023-12-18T12:03:00Z")

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Hi @Mohan_Reddy  
 ![image](https://global.discourse-cdn.com/uipath/original/4X/2/a/6/2a609ef04caafb16d007f2e77831cf63eaae6776.png)  
Please check this error

![image](https://global.discourse-cdn.com/uipath/original/4X/e/c/b/ecb06b10f257b74b4307e8be54ac7f0dbd43504b.png)

Please let me know  
If you have any solution , I am very thankfull to you.

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**Author:** ![Jon\_Smith](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/jon_smith/32/523286_2.png) [@Jon\_Smith](https://forum.uipath.com/u/Jon_Smith)\
**Post date:** [December 18, 2023, 1:09pm UTC](https://forum.uipath.com/t/library-compilation-process/707181/5 "2023-12-18T13:09:46Z")

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Sounds like you have a workflow with an invalid character at the start of it, are any of them unable to be opened?

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<div class="post-metadata">

**Author:** ![Mohan\_Reddy](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/mohan_reddy/32/443022_2.png) [@Mohan\_Reddy](https://forum.uipath.com/u/Mohan_Reddy)\
**Post date:** [December 19, 2023, 4:52am UTC](https://forum.uipath.com/t/library-compilation-process/707181/6 "2023-12-19T04:52:36Z")

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Hi @Ammaz_Ahmed ,

There are many reasons for the issue, please check the following threads the community members are discussed various methods to solve the issue.

[Document is invalid - Workflow - Help - UiPath Community Forum](https://forum.uipath.com/t/document-is-invalid-workflow/106876/7)  
[Document is invalid- Unable to open the Workflow file - Help / Studio - UiPath Community Forum](https://forum.uipath.com/t/document-is-invalid-unable-to-open-the-workflow-file/423098)  
[Document is Invalid Error - UiPath tool - Help / Orchestrator - UiPath Community Forum](https://forum.uipath.com/t/document-is-invalid-error-uipath-tool/258398)