Me and my simple questions: Can I do this in FPGA?

Hey tricky, I understand to you that I have several options, the most recommended would be first, try to make the Quartus Prime project to work with the same libraries that Modelsim is using, avoiding to work with the outdated file IEEE_PROPOSED. I did that by removing the downloaded files from proyect, and using the one in the files installed by Quartus Prime.

Quartus prime compiles good. But when I try to launch simulation from Quartus, Modelsim launch the same error than in previous post.

Then I tried loading only the file with the Adder (SUMADOR) and the Testbench. The file Adder compiles good, but for the testbench, Modelsim complinforms this error.

** Error: C:/altera_lite/15.1/elementos/SUMADOR_TEST.vhd(41): (vcom-1360) Array type of "numero1" does not have an index constraint.

** Error: C:/altera_lite/15.1/elementos/SUMADOR_TEST.vhd(42): (vcom-1360) Array type of "numero2" does not have an index constraint.

resultado : out ufixed (3 downto -7); Quartus wont compile for some reason, I have to put (3 downto -8) or higher to make it compile.

Finally, I was wondering if is Ok to ask this sort of questions in this forum. I understand you all are great users of Altera, and my questions looks too basic for you . If it so, please let me know, and I'll go some other forum more basic and I'll come back when I get more knowledge.