The following code compile and run fine as a VCL application under Win32, but creates access violation when running under Win64:
procedure TfrmMain.TMSFNCBloxControlRegisterElements(Sender: TObject);
RegisterElement(TANDBlock, '', 'AND', 'Logic');
I'm running RAD Studio 10.4 with Update 2.
Attached is a sample project that shows this behaviour:
BloxTest.zip (27.4 KB)