Please show us the full code for PROC PLS. Paste the code into the window that appears when you click on the 'little running man' icon. (From now on, when a PROC isn't working right, please show us the full code for that PROC automatically, don't wait for us to ask)
ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.