Due to a problem in the Quartus® Prime software, the following TX statistics registers will read back as '0': CNTR_TX_FRAGMENTS_LO, CNTR_TX_JABBER_LO, CNTR_TX_CRCERR_LO, CNTR_TX_FRAGMENTS_HI, CNTR_TX_JABBER_HI, CNTR_TX_CRCERR_HI
Area: Intellectual Property
Last Modified: June 19, 2017
Version Found: v16.1
Bug ID: FB: 459730;
This problem is not scheduled to be fixed. To work around this issue, the user should create his own counters for these statistics.