Intel: During compilation, the message "Can't place <number> pins with <name> I/O standard because Fitter has only <number> such free pins available for general purpose I/O placement" appears and compilation does not finish. Could you please tell me the cause and how to solve it?

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Intel: The message <Can't place <number> pins with <name> I/O standard because Fitter has only <number> such free pins available for general purpose I/O placement> is displayed during compilation, and compilation ends. I don't. Could you tell me the cause and solution?

Quartus Prime

This can happen if your design uses more I/Os than the number of I/O pins on the device or the number of I/Os in the specified bank.
The main case is when doing a full compilation on a lower level design.

There are three possible workarounds:

1) Reduce the number of pins used.
2) Change to a device with more I/O pins.
3) In the design of the lower hierarchy, if it is not originally used as an I/O pin, use the Assignment Editor settings to
Set this pin as “Virtual Pin”.

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