I/O Cell Cannot Be Found Error When Compiling ALTMEMPHY-Based Interfaces - I/O Cell Cannot Be Found Error When Compiling ALTMEMPHY-Based Interfaces Description This problem affects DDR, DDR2, and DDR3, ALTMEMPHY-based products. For ALTMEMPHY-based products, you might encounter an error during compilation, reporting that an I/O cell cannot be found. This error occurs because a necessary device library is missing from the QSYS-generated simulation script. Resolution The workaround for this issue is to manually compile the missing device library, or use ModelSim. This issue will not be fixed. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']