Internal Error: Sub-system: STA, File: /quartus/tsm/sta/sta_thread_worker.cpp, Line: 892 - Internal Error: Sub-system: STA, File: /quartus/tsm/sta/sta_thread_worker.cpp, Line: 892 Description This error may be seen in the Quartus® II software version 11.0 and later when the report_skew (Synopsys Design Constraint (SDC) command is run in the TimeQuest timing analyzer without specifying any paths or clocks. Resolution To work around this problem, ensure a path or clock is defined when running the report_skew command. For more information on the syntax of the report_skew SDC command and example usage, refer to Quartus II Help . This problem is fixed beginning with the Quartus II software version 12.0. Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.0 11.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']