Debugger does not show value of long character strings

Run the following code

!ftn95$free

program main 
CHARACTER*9000   :: CH
    CHARACTER*1 C1

 	   CH  =  ' '
     
	DO I = 1, len(ch)
	 c1 = 'H'
	 CH(I:I) = C1
	END DO
	print*,'ch=',trim(ch)
end program

If you put a breakpoint on the print statement, then CH appears to be empty. When reducing the size of CH to (say) 90, then it shows it correctly. The print statement does show CH correctly in all cases.

I have been advised that if you right-click on the variable and choose Memory dump you can see the value.