I am working with an example program using HDL optimized RS encoder/decoder. You can find the example here
It is working fine for N = 255, K = 239 and HDL files are being generated perfectly.
Then I tried N = 15, K = 9 by adjusting the paramters and encoder/decoder polynomial [1 0 0 1 1] according to that, I get correct simulations result and HDL file is also generated.
But when i put N=11, K=9 for the same polynomial, the simulation works fine and it gives thecorrect result but while generating the HDL file, I get this error
In case you need to adjust the model according to my paramters, I am attaching screenshots by which you make the alterations.