Why does the Quartus II Text Editor freeze when highlighting a number? - Why does the Quartus II Text Editor freeze when highlighting a number? Description Due to a problem in the Quartus® II software Text Editor versions 11.1 and 12.0, highlighting a number in the Text Editor may cause the Quartus II Text Editor to freeze. Resolution To work around this issue, turn off the Highlight similar instances of a selected word option by following the steps below: Open the Quartus II Text Editor Select Options from the Tools menu Click on Text Editor in the Category window Turn off the option Highlight similar instances of a selected word This problem is fixed beginning with the Quartus II software version 12.1. Related Articles Why does the Quartus II software freeze when I highlight a number in the Text Editor? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] 12.1 11.1 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']