JTAG pins constraints (18.1) - JTAG pins constraints (18.1) I have a project once had no constraint warning. Then I enabled dynamic reconfiguration ports for Transceiver toolkit. Since then, every compile show unconstrained warning for: altera_reserved_ntrst altera_reserved_tdi altera_reserved_tms altera_reserved_tdo Indeed, I have not specified anywhere about these pins. Similar source code in previous revisions when there is no such warnings. In a newly created project, I have the same Unconstrained Paths warnings. I am curious, do I have to constraint JTAG pins? Replies: Re: JTAG pins constraints (18.1) I think good found me the answer: https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd04282008_867.html