I have an existing design which uses Active Serial Configuration via an EPCQ128. After migrating to the EPCQ128A, I am having problems with remote updating.

Hi MSchu18, If your design do not contain IP Cores (which interface with the configuration device), your existing programming files may be compatible with EPCQ-A devices without the need to regenerate the programming files. Refer to Table 3 on page 6 for more details. If you design contain IP core, please refer to Table 1 & Table 2 (on page 5) for the IP core compatibility. https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an822.pdf I hope this will help. Thanks