ID:12536 Can't reserve pin <name> -- pin name is an illegal or unsupported format

CAUSE: You reserved the specified pin. However, the pin name you specified is in an illegal or unsupported format. This message can occur when the Fitter cannot locate the specified pin name, for example, when you edit the Quartus Prime Settings File (.qsf) outside the Quartus Prime software.

ACTION: If you do not want the Fitter to reserve the pin, no action is required. Otherwise, change the pin name to a legal name.