Why does my Configuration via Protocol (CvP) design fail link training and not load the core image when I use a SOF from a Quartus II software version 13.0 or lower in CvP Initialization mode?

There is a known issue with the Convert Programming files conversion of the SRAM Object File (.sof) from Quartus® II software version 12.0 through 12.1sp1. The "Disable EPCS ID check" was enabled from version 12.0 through 12.1sp1 which caused the issue with link training and loading of the core image.

To workaround this issue in Quartus II software version 12.0 through 12.1 sp1, go to the Advanced tab of the the Convert Programming Files window and check the checkbox labeled "Disable EPCS ID check". 

In Quartus II software version 13.0 and beyond, the "Disable EPCS ID check" is correctly set to disable.