Fitter Error Occurs When Read DQS Tracking is Enabled - Fitter Error Occurs When Read DQS Tracking is Enabled Description This problem affects DDR2 and DDR3 products. In version 11.1 SP1, a Fitter error occurs when Read DQS Tracking is enabled. Resolution The workaround for this issue is to add the following in lines 1005-1006 of altdq_dqs2_stratixv.sv : always @(negedge dqs_disable_int) dqs_ff <= dqsin; Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] 11.1.2 11.1.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue'] - 2021-08-25

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