![fastreport 4 fastreport 4](https://origin2.cdn.componentsource.com/sites/default/files/styles/image_medium/public/images/feature_release/2019/06/17/img_680991.png)
With your Demo and with a new project, it is doing the same behavior. I decided to reinstall CoreLabs components and retry it. I tried also to add a query in your demo, add the filter and it does the same behavior.
![fastreport 4 fastreport 4](https://windows-cdn.softpedia.com/screenshots/FastReport_1.png)
![fastreport 4 fastreport 4](https://downloadly.ir/wp-content/uploads/2018/05/FastReport-.NET_.png)
with the box "Ignore / Cancel / Ignore All", and it will do the error. If you create a new project with fr components, building the report with the filter assignment in the code, saving the project, closing the project, closing Delphi, reopen delphi, reopen the project, delphi said the following error from Delphi IDE : "Class TfrxSDACQuery not found". If you create a new project with fr components, building the report with the filter assignment in the code, saving the project, closing the project, reopen it, retry it WONT DO the error !!?!. If you create a new project with fr components, building the report with the filter assignment in the code, saving the project, it will do the error. If you create a new project with fr components, building the report with the filter assignment in the code, without saving the project, it will do the error. Ive done many tests and here is what i see :