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4.2

I cannot remove an object from TObjectList

Asked by fedra in Delphi Programming, Free Pascal

Tags: Delphi 7, raised exception class EInvalidPointer with message 'Invalid pointer operation'. Process stopped. Use Step or Run to continue.

Hi.

I want to put some objects in a TObjectList. I want to keep the objects in memory after this TObjectList is destroyed so I MUST keep the OwnsObjects= false.

I load the objects like this:

-------------------

GetCub is like this:

function TCubList.GetCub(Poz: Integer): TCubObj;
begin
Result:= TCubObj(self[Poz]);
end;

[Delphi 7]

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             type TCubList = class(TObjectList)
 
procedure Something;
var LCub: TCubList ;
    NewCub: TCubObj;
begin
 repeat 
  NewCub:= TCubObj.Create; 
  Error:= NewCub.ImportFile;
  if Error<> '' then                   { if error loading this file then don't add it to the list }
     begin 
       FreeAndNil(NewCub);
       Continue;
     end;
  LCub.Add(NewCub);        
 until something;
 
 for x:= Lcub.Count-1 downto 0 DO
  begin
    Cub:= LCub.GetCub(x);
    if Cub.Vec.Count= 0 then then  
       begin 
         Lcub.Remove(Cub);
         Cub.Free;                                   <-------- HERE EInvalidPointer ERROR
       end;
   end;
end;

           
         

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I cannot remove an object from TObjectList

Asked by fedra in Delphi Programming, Free Pascal

Tags: Delphi 7, raised exception class EInvalidPointer with message 'Invalid pointer operation'. Process stopped. Use Step or Run to continue.

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