Is there a way to avoid clicking "Start Compilation" multiple times? - Is there a way to avoid clicking "Start Compilation" multiple times? When I click "Start Compilation", it will normally fail a couple of times with error message about missing files(regarding inferred RAM), before it starts properly. Once Quartus Prime gets going, it works. Any tips on why Quartus is having problems starting the design? Is there a way to clean out build files? This is with Quartus 19.2.0 Build 57 Replies: Re: Is there a way to avoid clicking "Start Compilation" multiple times? Hi, Please check the below solution, https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/tools/2017/why-does-quartus-give-a-instantiates-undefined-entity-error-when.html let me know, how it works for you. Regards, Vicky Replies: Re: Is there a way to avoid clicking "Start Compilation" multiple times? This fixes the Project->Clean error, but I still see the Start Compile error: [deleted] Error(16045): Instance "aptos|configurationWordCache|tags_address_rtl_0|auto_generated" instantiates undefined entity "altsyncram_elk1" Error(16185): Can't elaborate user hierarchy "..|tags_address_rtl_0|auto_generated" Error(16185): Can't elaborate user hierarchy "..|tags_address_rtl_0" [deleted] Replies: Re: Is there a way to avoid clicking "Start Compilation" multiple times? Hi, Please check the below solution, https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd09162005_332.html let me know, how it works for you. Regards, Vicky Replies: Re: Is there a way to avoid clicking "Start Compilation" multiple times? Here are the errors. There are lots of them and they are all very similar. [deleted] Error(16045): Instance "aptos|configurationWordCache|tags_address_rtl_0|auto_generated" instantiates undefined entity "altsyncram_elk1" Error(16185): Can't elaborate user hierarchy "..|tags_address_rtl_0|auto_generated" Error(16185): Can't elaborate user hierarchy "..|tags_address_rtl_0" [deleted] Project -> Clean, resulted in: Error(23035): Tcl error: ERROR: Can't access revision 'myrevisionname'. The revision may not exist, or there may be an error in the revision settings. while executing "project_clean -revision $revision" invoked from within "if { ![project_exists $project_name] } { post_message -type error "Cannot clean project $project_name: this project doesn't exist" } else { pr..." (file "/opt/intelFPGA_pro/19.2/quartus/common/tcl/internal/qsh_clean.tcl" line 81) Error(23031): Evaluation of Tcl script /opt/intelFPGA_pro/19.2/quartus/common/tcl/internal/qsh_clean.tcl unsuccessful After cleaning, even though it failed, Quartus started compilation(got past synthesis) fine. Replies: Re: Is there a way to avoid clicking "Start Compilation" multiple times? Hi, Please check multiple options available under 'Processing' -> 'Start' menu. "Is there a way to clean out build files?" -- - - - - ether you can do 'Project' -> 'Clean Project' or best way is, close the Quartus tool & delete the 'db' & 'Incremental_db' from project generation directory & then try to compile. Please let me know, if you have any different concern, also provide error message screenshot. Regards, Vicky