set GUI position, jumps back to former position

Hey, I've created two GUIs. The first one closes when the second one opens. Now, I want the second GUI to be in the same position as the first one when closed. It shortly works, but it then moves into its default-position (where the first GUI was opened).

I've written the following code in the first GUI just before calling the second one: Position = get(gcf,'OuterPosition'); setappdata(0,'Position',Position);

What I've got in the second GUI's OpeningFcn is Position = getappdata(0,'Position'); set(gcf,'OuterPosition',Position);

I've debugged the code and what happens is: set(gcf,'OuterPosition',Position) does work. After the OpeningFcn, the gui_mainfcn is called automatically. The follownig code is from line 233 to 237 of the gui_mainfcn:

        if ~gui_Exported
            gui_hFigure = local_openfig(gui_State.gui_Name, 'reuse',gui_Visible);
        elseif ~isempty(gui_VisibleInput)
            set(gui_hFigure,'Visible',gui_VisibleInput);
        end

The variable gui_Exported is FALSE so Line 234 is being executed. After that command the GUI moves back into its default-position.

So what does line 234 excactly do? And what's the variable gui_Exported? How could I solve this issue by editing the gui_mainfcn? I assume you're not meant to edit the gui_mainfcn, though. Any ideas how to solve this one?

[Gerrit]

I just used the same code for a smaller version and it works. I have no idea why, though. It even does the same thing in the gui_mainfcn. It executes that line 234 and even the value of the variable gui_Visible which seems to be the only thing that could be changed in that line is the same (value is auto). I don't see what's going on here.