FORTRAN 90 iteration issues

[Milentije]

I have problems with my code.As a result of calculation I got rank2 l(21,1) array.Due to the THE ITERATIVE PROCESS I will get the same array in every iteration.How to allocate values and use them later.Should I create new array
like
do iter=1,n
lbig(iter,nmax,1)=l(nmax,1)?

[swartzism]

Can you post the section of your code you're talking about? Your description is hard to address without some visuals.