ID:176291 Can't place <number> pins with I/O standards supported only on vertical I/O pins -- only <number> free vertical I/O pins pins available for general purpose I/O placement

CAUSE: You assigned I/O standards which can only be used on vertical I/O pins to the specified number of pins. However, the Fitter cannot place the pins with these I/O standards because it has only the specified number of free vertical I/O pins available for general purpose I/O placement.

ACTION: Change the location assignments on the pins which use vertical I/O pin locations or the I/O standard assignments on the pins which need to be placed in vertical I/O locations.