subplot help plotting 12 plots in one figure

I;m trying to create a image of size 6.3 by 6.3 inches which contains 12 subplot. When i try to plot the seventh subplot it plots but the 4th one disappears any help is appreciated

set(gcf, 'PaperPositionMode', 'manual');
set(gcf, 'PaperUnits', 'inches');
set(gcf, 'PaperPosition', [0 0 6.3 6.4]);
h11                                 =   axes('Fontsize',12,'Nextplot','add');
load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,1);
set(h1,'Unit','inches','Position',[0,0,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,2);
set(h1,'Unit','inches','Position',[2.1,0,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,3);
set(h1,'Unit','inches','Position',[4.3,0,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,4);
set(h1,'Unit','inches','Position',[0,2,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,5);
set(h1,'Unit','inches','Position',[2.1,2,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,6);
set(h1,'Unit','inches','Position',[4.3,2,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,7);
set(h1,'Unit','inches','Position',[0,4,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

load('D:\sc\Rnn');
set(gcf,'color','white')
h1=subplot(4,3,8);
set(h1,'Unit','inches','Position',[2.1,4,2.01,1.4]);
hd=imagesc(real(Rn));
set(hd,'alphadata',~isnan(Rn))
colorbar
title('H (W m^-^2)','Fontsize',10)
set(gca,'ytick',[])
set(gca,'xtick',[])
grid on

hold on;

Answer 1

[Image Analyst]

Why are you calling:

set(h1,'Unit','inches','Position',[2.1,2,2.01,1.4]);

Usually when a plot disappears it's because you've overlapped a prior plot. This could be caused by you manually adjusting the sizes of your plots, and your 7th plot overlaps some part of your 4th plot.