SOLVED: Exception class 'EProcess', message "Failed to execute :267"

[puzzled]

Under Windows 10 I am trying to run ImageMagick on a graphic file.  I use TProcess for this purpose, and put handling of TProcess in its own procedure.  I get the following Debugger Exception Notification:

Project project1 raised exception class 'EProcess' with message:
Failed to execute  : 267
At address 4E68F2


The code, triggered by clicking a button, looks like

procedure TForm1.btnTestClick(Sender: TObject);
var
  MCurrentDirectory: string;
  MExecutable: string;
  MParameters: array of string;
begin
  MCurrentDirectory:= '"C:\Users\puzzled\downloads\graphics stuff\sample images"';
  MExecutable:= '"C:\Program Files\ImageMagick\magick.exe"';
  MParameters:= ['"C:\Users\puzzled\Documents\Lazarus\Resource files\arrow.png"',
                 '-alpha', 'set',
                 '-background', 'none',
                 '-rotate', '-44',
                 '"C:\Users\puzzled\downloads\graphics stuff\processed images\arrow44.png"'];
  TProcessHandling(MCurrentDirectory,
                   MExecutable,
                   MParameters);
end;   

procedure TForm1.TProcessHandling(MCurrentDirectory: string;
                                  MExecutable: string;
                                  MParameters: array of string);
var
  RunProgram: TProcess;
  s:string;
begin
  RunProgram := TProcess.Create(nil);
  RunProgram.CurrentDirectory:=MCurrentDirectory;
  RunProgram.Executable:=MExecutable;
  for s in MParameters do
    RunProgram.Parameters.Add(s);
  // Wait until done
  RunProgram.Options := RunProgram.Options + [poWaitOnExit];
  // Run ImageMagick
  RunProgram.Execute;     <--- Exception takes place here
  Runprogram.Free;
end; }


This DOS command, including double quote marks, works without error when run manually:

"C:\Program Files\ImageMagick\magick.exe" "C:\Users\puzzled\Documents\Lazarus\Resource files\arrow.png" -alpha set -background none -rotate 44 "C:\Users\puzzled\downloads\graphics stuff\processed images\arrow44.png"

Thank you for your guidance

[Fibonacci]

267 is ERROR_DIRECTORY

Remove all quote marks from MCurrentDirectory, MExecutable and MParameters

[Thaddy]

nope:

Code: Pascal  [Select][+][-]

1.   Mparameters.AddStrings( ['"C:\Users\puzzled\Documents\Lazarus\Resource files\arrow.png"',
2.                  '-alpha', 'set',
3.                  '-background', 'none',
4.                  '-rotate', '-44',
5.                  '"C:\Users\puzzled\downloads\graphics stuff\processed images\arrow44.png"']);

Mparameters is - afaik - not overloaded to accept the strings directly. use AddStrings.
in this case the quotation marks are necessary, but make sure the paths exist.

[puzzled]

REMOVING THE DOUBLE QUOTES WAS THE SOLUTION.
(How do I mark this as solved?)

Thank you!

[Thaddy]

That can not be right on windows...
keep it open.

[PascalDragon]

That can not be right on windows...

It is right, because TProcess handles the quoting itself. Manually adding quotation marks will mess that up.