Hi
at the bottom of the post "https://community.intel.com/t5/FPGA-Intellectual-Property/Glitch-less-clock/m-p/1437771"
is written " glitch free clock switchover option is not available in any of the Clock Control IP for Stratix 10 at the moment "
therefore it was not clear if there is any Stx10 - HW constraint that prevents from implementing it ... or it will be implemented in the future ...
moreover the error you are getting from Quartus (once trying to enable the glitch free" ) is error related to "Quartus Version" and not to the Stx10 HW which is used - which increase the confusion .
anyway - the answer is clear now - that in Stx10 there is no glitch free mux now and in the future .
Or.