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Things take unfortunately more time that you always expect, in the IT world.
What does this mean exactly? Can you tell us now, if you are still on track with your roadmap? For example, is the launch of the exchange (presumingly still planned for Q1 of 2019?
I can understand that often unexpected issues appear, so delays can happen but if there is one, you should try to communicate it as fast as possible.
No for the exchange we keep the date on, I speak more in a general way. I see everyday tasks that take us a week instead of few days as example.