ID:177021 The external clock driver <name> cannot have an ENA_REGISTER_MODE setting of <value>. The only valid settings for external clock drivers are 'always enabled' or 'falling edge'

CAUSE: The given external clock driver has an unsupported ENA_REGISTER_MODE parameter setting.

ACTION: For external clock drivers, the parameter setting should be set to always enabled or falling edge. Try editing the ALTCLKCTRL Megafunction instance to change the parameter value, or modify the parameter setting in the RTL.