Sorry @RobertWood and @LouisAraiza forgot to change back SocialCast notification settings since coming back from Disney Cruise.
@CindyIsche - Glad it's resolved! General note - whether it's server or IP, there are 2 places on client side to change: 1) In Sota.ini AND on the MAS 200 shortcut target. If you fix it on 1 but not the other, error persists.
Also on my own last Error 15 on MAS 200 startup, I did this: In location where Wkstn Setup was run, open that pvxwin32.exe and type this:
open(1)""[tcp]192.168.1.70;9500""
Substitute that IP and port with the real one. I got an error 15 this way too (meaning external cause) and led me to discover some internet security software was blocking my request. But had it returned me to a -> prompt on the next line (that is no errors), it means that IP and port are good, ergo look in Sota.ini and in shortcut target path for discrepancies. Hope that helps for future. Good catch on the CmdAsUser !