https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228820#M2796 You can get this message if an add-on has previously stored data in the project but is now not loaded. ARCHICAD is basically asking if it's ok to discard that data.<BR /> <BR /> Do you think you may have saved your template file while those add-ons were loaded? That would explain seeing that message for every new project (because it starts from a template). Wed, 18 Mar 2020 14:01:06 GMT Ralph Wessel 2020-03-18T14:01:06Z https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228819#M2795 <DIV class="actalk-migrated-content"><FONT color="#000000">I'm getting this error every time I load a new project file in Archicad. I had tested some API Example Add-Ons and then unloaded them. Why am I getting this?</FONT></DIV> Wed, 15 Sep 2021 10:37:15 GMT https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228819#M2795 dushyant 2021-09-15T10:37:15Z https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228820#M2796 You can get this message if an add-on has previously stored data in the project but is now not loaded. ARCHICAD is basically asking if it's ok to discard that data.<BR /> <BR /> Do you think you may have saved your template file while those add-ons were loaded? That would explain seeing that message for every new project (because it starts from a template). Wed, 18 Mar 2020 14:01:06 GMT https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228820#M2796 Ralph Wessel 2020-03-18T14:01:06Z https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228821#M2797 Yes, it was the template that had the traces of the add-on. Thanks. Wed, 18 Mar 2020 14:54:59 GMT https://community.graphisoft.com/t5/Archicad-C-API/Missing-Add-Ons-message/m-p/228821#M2797 dushyant 2020-03-18T14:54:59Z