add .qsys is good, add .qip of the Qsys is bad

[Altera_Forum]

Hi,  

When I add the .qip generated by Qsys-edit in my Quartus project,  as said in PDF manuals, and then develop software for that, I get mismatched timestamps Expected system timestamp: 1348579121 Connected system timestamp: 1348748439 Difference is near 3min 50s.  When I add the .qsys in my quartys project (previously removed .qip from project), timestamps match. But Quartus resynthesizes the Qsys component wich takes a few minutes.  Adding .qip save compilation time, it would be better if timestamps match. Just for you Altera developpers. Kindest regards.

[Altera_Forum]

i have never seen this error, and cant understand why you would either. I would suggest checking that the qsys file is removed entirely from the qsf to ensure the qsys system is not being regenerated during compilation.

[Altera_Forum]

When I remove .qsys and add .qip in project settings, the .qsf file is properly regenerated : it contains no reference to .qsys. 

 But I may find : my qsys system is not at the project root path, it is in a custom "src" subdirectory. Maybe the (minor) problem is this.  OK, that was the problem. I saved my Qsys in my Quartus project root directory, deleted the old qsys, adapt project files settings, and everything is correct. :)  quartus 12.0sp1 + nios ii web edition qsys from scratch (no sopc to qsys migration : that is to say tri-stated components are from qsys)