I am using Quickfix to connect to CTS and I'm having the same exact problem as @Wapiti experienced in this thread.
Whenever I turn on the DataDictionary and direct to the location of my DataDictionary file, I am unable to Logon to CTS.
Whenever I turn off the DataDictionary, I succeed logging onto CTS but I get the same error that @Wapiti posted:
Event log: Message 3 Rejected: Tag appears more than once:269
Message log: 20190307-19:38:54.000000000 : 8=FIX.4.29=10435=334=549=XXXX52=20190307-19:38:54.00056=CTS45=558=Tag appears more than once371=269372=W10=005
Tag 269 is MDEntryType and it should be a repeating group. I realize my problem probably has to do with the configuration of my data dictionary. I tried switching from 'DataDictionary=...' to 'AppDataDictionary=...' as Steve recommended in the thread linked to above but that didn't resolve the problem.
Any ideas?