LukiLeu
New Contributor
1 hour agoQuartus crashes on long carry chain in Agilex 5 FPGAs
We try to manually place a carry chain in the Agilex 5 FPGAs which consists of more than 40 LABs. When we place this carry chain using set_location_assignment, Quartus crashes during the placement phase whenever the carry chain is longer than 40 LABs.
Is it expected that the carry chain cannot be made longer than 40 LABs in the Agilex 5 FPGAs?
Crash was observed on Quartus 25.3 and Quartus 26.1 for the devices A5ED065BB32AE4S and A5ED013BB32AE4SCS.
Internal Error: Sub-system: FLABS, File: /quartus/fitter/flabs/flabs_util.cpp, Line: 96 p_to_fill->next == FLABS_OPEN