We are looking to upgrade a system and replace OPCDA 2010 (with DA & HDA) with OPCDA 2018. This has left us with two problems.
1) Existing OPC DA connections won't work because the ProgID has changed.
2) OPC HDA clients won't work because the HDA Server isn't included.
Point 2) would mean I have to also install OPC HDA Server 2016, but Point 1) is a real problem, as the clients using the link aren't prepared to change anything.
Can OPC DA 2010 be installed on the same machine as OPCDA 2018?
It is likely I will have to remain with OPC DA 2010 as a minimum, so can I upgrade just the HDA to 2016 (as they haven't messed up the ProgID!)