Error (175020): Illegal constraint of pin to the region <region> to <region> : no valid locations in region - Error (175020): Illegal constraint of pin to the region <region> to <region> : no valid locations in region Description You may get this error in the Quartus ® II software when you are using DQ pins in your design and you have the migration feature enabled. The DQ groups may have conflicting pin locations between migration devices resulting in a lack of usable DQ pins in the respective DQ group. This means that pins in the respective DQ group can only be used as general purpose I/O (GPIO). Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']