# C11 migration of C5 - troubleshooting Unresolved External **URL:** \ **Category:** uncategorized\ **Created:** [December 13, 2023, 3:48am UTC](https://clarionhub.com/t/c11-migration-of-c5-troubleshooting-unresolved-external/6843 "2023-12-13T03:48:13Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![CarlBarnes](https://clarionhub.com/user_avatar/clarionhub.com/carlbarnes/32/1859_2.png) [@CarlBarnes](https://clarionhub.com/u/CarlBarnes)\ **Post date:** [December 13, 2023, 4:59pm UTC](https://clarionhub.com/t/c11-migration-of-c5-troubleshooting-unresolved-external/6843/5 "2023-12-13T16:59:01Z")
A new build file worth knowing about in C11 is FileList.XML, that did not exist in C5. You will find that in your OBJ\BuildType folder named _AppName.CwProj.FileList.XML_. Technically its not “_AppName_” but “_Target Name_” which for most projects is AppName. In that file you would find under `` where your LIB files are coming from, and `` where they were written. You may find they are from your **Obj\Debug** folder. As Bruce said you want to [modify your RED file](https://clarionhub.com/t/editing-default-redirection-red-file-to-create-lib-with-dll-in-project-folder/1646) so the LIBs are written to the Project folder the same as the DLLs. I check the OBJ folder to see I only have files in the Debug folder and not Release. I think it is less problem prone to build all projects in a folder one way which for me is Debug, or you can build all Release. --- _[View the full topic](https://clarionhub.com/t/c11-migration-of-c5-troubleshooting-unresolved-external/6843)._