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Cannot Load Dynamic Library Libmysqldll Sql Manager


Cannot Load Dynamic Library Libmysqldll Sql Manager




If you are trying to connect to a MySQL database using DBExpress in Delphi, you may encounter an error message like this: "Failure to Connect : Unable to load libmysql.dll" or "[FireDAC] [Phys] [MySQL]-314. Cannot load vendor library [libmysql.dll or libmysqld.dll]. Hint check it is in the PATH or application EXE directories, and has x86 bitness." This article will explain the possible causes and solutions for this problem.


What is libmysql.dll?




libmysql.dll is a dynamic link library (DLL) file that contains the client library for MySQL, which is used by applications that communicate with MySQL servers. It provides functions for connecting, querying, and managing data in MySQL databases. libmysqld.dll is a similar DLL file that contains the embedded server library for MySQL, which is used by applications that run their own MySQL server instance.




Cannot Load Dynamic Library Libmysqldll Sql Manager



Why does the error occur?




The error occurs when the application cannot find or load the libmysql.dll or libmysqld.dll file. There are several possible reasons for this:


  • The libmysql.dll or libmysqld.dll file is missing from the application directory or the system PATH.



  • The libmysql.dll or libmysqld.dll file is incompatible with the MySQL server version or the application architecture (x86 or x64).



  • The libmysql.dll or libmysqld.dll file is corrupted or infected by malware.



  • The application is using an outdated or unsupported DBExpress driver for MySQL.



How to fix the error?




Depending on the cause of the error, there are different ways to fix it:


  • If the libmysql.dll or libmysqld.dll file is missing, you can copy it from the MySQL installation directory (usually C:\Program Files\MySQL\MySQL Server X.Y\lib) or download it from the official MySQL website ([1]) and place it in the application directory or add it to the system PATH.



  • If the libmysql.dll or libmysqld.dll file is incompatible, you can check the MySQL server version and the application architecture and download the appropriate version of the DLL file from the official MySQL website ([1]). You can also use a tool like Dependency Walker ([2]) to check if the DLL file has any missing dependencies.



  • If the libmysql.dll or libmysqld.dll file is corrupted or infected, you can scan your system with an antivirus or anti-malware program and replace the DLL file with a clean one from the official MySQL website ([1]).



  • If the application is using an outdated or unsupported DBExpress driver for MySQL, you can update it to a newer version that supports MySQL 5 or higher. You can find open source DBExpress drivers for MySQL 5 on GitHub ([3]) or SourceForge ([4]). You can also follow the instructions on how to add a new DBExpress driver in the Delphi documentation ([5]).



Conclusion




In this article, we have discussed the possible causes and solutions for the error "Cannot Load Dynamic Library Libmysqldll Sql Manager" that occurs when trying to connect to a MySQL database using DBExpress in Delphi. We hope this article has helped you resolve this issue and enjoy working with MySQL databases in Delphi.




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