We are upgrading to ECC6 with ehp4. this wiki on sdn talks about how to get rid of versio mismatch for mss/ess components. https://wiki.sdn.sap.com/wiki/display/ERPHCM/HOWTOGETRIDOFSPSTACKMISMATCHISSUES
I know in the case of learning solution, if ehp4 is installed but the new business function is not turned on, the java components should be used will still be 600, instead of 604 version. Does this also apply to ess/mss? i.e. if we installed ehp4 but not turning on 604 business functions for ess/mss, do i use the 600 or 604 version of the java component and BP? or is this even a valid concern for ESS/MSS?
Thanks,
Jane Zhou