Problems working thru "Using Triple-Speed Ethernet on DE2-115 Boards"

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hi I got about 250 errors during compilation saying either:

1. can't generate netlist output files because the file "............" is an OpenCore Plus time-limited file

2. ''can't generate netlist output files because the license for encrypted file "..." is not available"

.........does this mean that the "Using Triple-Speed Ethernet on DE2-115 Boards" tutorial is not doable without paying for something or something else?

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You need to examine your install settings, you may have installed Quartus incorrectly.

And it works just fine with only the tools available/shipped with the board. It also works fine with the web (free) edition of the software. You need to be familiar with Quartus, Qsys (and SOPC builder), how the top level etity ties it all together.... and then you also need to be familiar with eclipse and the EDK-modifications to it -- the BSP and how to download code and later how to generate your hex file for memory initialization so it will run without being tethered.

The learning curve is quite steep for FPGA w/soft core processors...

Keep at it, but start with simpler examples to make sure your tools are installed correctly.