When implementing an SPI-4.2 Lite design through Bitgen, I receive several "WARNING" messages.
The following warnings are harmless and can be ignored.
Example:
WARNING:PhysDesignRules:812 - Dangling pin on block::<D IFFMI_IFF1>.
WARNING:PhysDesignRules:812 - Dangling pin on block::<D IFFMI_IFF1>.
WARNING:PhysDesignRules:812 - Dangling pin on block::<D IFFMI_IFF1>.