EResnotFound, CreateNew, RequireDerivedFormResource

[vfclists]

A new project I am creating is giving me this error message at runtime when try to use RX TDBDateEdit.

Project project1 raised exception class 'EResNotFound' with message;

Form resource TPopupCalendar not found. For resourceless forms CreateNew musst be used. See the global variable RequireDerivedFormResource.

In file '.\include\customform.inc ' at line 1957

If I am in a bit of hurry at the moment. If I switch to .lrs files for resource will it go away?

I am using Lazarus 1.0.6 fixes with FPC 2.6.0 fixes

[JuhaManninen]

Form resource TPopupCalendar not found. For resourceless forms CreateNew musst be used. See the global variable RequireDerivedFormResource.
...
If I am in a bit of hurry at the moment. If I switch to .lrs files for resource will it go away?

No, the .res resources work well. For some reason they are not found now.

[vfclists]

After switching to .lrs files and removing the RequireDerivedFormResource := True statement it all works now. Obviously this must be some relatively new method of resource handling in Lazarus I don't know much about.

Is there some place to get some more information?

Is it something that component designers need to adapt their code for?

[JuhaManninen]

When a form does not have a resource file then it must be created with CreateNew(), as your error message said. However I understood your form has a resource file.

This feature is not very new, it has been there for some years already.

[taazz]

When a form does not have a resource file then it must be created with CreateNew(), as your error message said. However I understood your form has a resource file.

Actually the problem with that approach is that even if the form does not have a resource but everything is dynamically created in the constructor if you call createNew instead, the code that creates everything never executes (aka create constructor). I have found that it is better to set the RequireDerivedFormResource to false and keep that way.

[BigChimp]

Is there some place to get some more information?

The Lazarus changelog on the wiki has some info IIRC. Would be around 0.9.30 I think.