Hi, If you get an error about a delegate, e.g. ResourceValuesForKeysDelegateMBS, please install MBS Xojo Plugins in version 23.6 or newer. Download here: https://www.monkeybreadsoftware.de/xojo/download/plugin/Prerelease/ See also our blog post: https://www.mbsplugins.de/archive/2023-12-12/Xojo_2023r4_released Best regards, Christian -- Read our blog about news on our plugins: http://www.mbsplugins.de/