# What does 'iteration limit reached without convergence' mean in SAS Proc PLS

I receive the warning 'iteration limit reached without convergence' when using PROC PLS in SAS. What does this warning mean?

I have 1,540 observations, 900 dependent variables and 600 independent variables. I am trying to generate 15 components. Is this just too many variables? I also received the same warning with approximately 100 independent and dependent variables and the same sample size and component number.

One final thing you can try is to manually increase the iteration limit in SAS - this might do the trick. In PLS, you can specify the maxiter = option; the default is 200 iterations, try increasing it to 500 or something. You can find more details from the SAS Guide for PLS Statements.