Lazarus resource - Using a resource leads to an error in linking - resources

Question

I searched around but found not any solution, so I try here:
I want to integrate images (I did it with delphi before in this way) that are used by my program and load them at runtime.
My idea was to
1.) create a resource file with
lazres <resourcename> <imagename>
2.) include the resource file in the source
{$R <resourcename>}
3.) compile
Result:
Unable to find file "Debug: Trying to open file /medi/media/work/src.hg/ylazlib/test/test.src/libtest6.lpr".
The filename above is the project source and should be found.
I found out that this error almost alwas results from invalid resource files.
But the message should be explaining the problem in a better manner.
If I rename the resource file ( so it can not be found by linker) I get a 'correct' error message. In this case the unit that requires the resource is opened and the message states that the resource file can not be opened.
So what am I doing wrong here?
(I also tried to insert images in different format to the resource - so the image itself may not the problem)
any help apreciated - Thanks in advance
Note: OS: debian sid [fpc 2.6.4] Lazarus SVN

Answer 1

The procedure to follow is a bit different than in Delphi. As explained here, you have to
add LResources to the uses clause.
include the res file produced by Lazres in the initialization section.
uses {$I myRes} rather than {$R myRes}.
a quick test with
console lzares cmd:
C:\Users\me\Desktop\temp>lazres res.res project1.lpr=blah
source code:
unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs,LResources;
type
TForm1 = class(TForm)
private
{ private declarations }
public
{ public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
initialization
{$I res.res}
end.
compiles and runs fine. Then later this can be a bit tricky to load the res if they are raw data but for pictures it's quite straightforward, cf the example in the previous link.