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[EnergyPlus_Support] zone mass balance with AFN exhaust fans

Dear Group,
I'm having the following error multiple times after supposidly creating a mass imbalance with my newly added zoneexhaust fans and their respective AFN corresponding objects. Is this (still) expected? I get this in all zones, including those without exhaust, but as they are all connected throught the AFN, this is hardly supprising:

   ** Warning ** SimHVAC: Maximum iterations (100) exceeded for all HVAC loops, at KITA, 01/01 18:09 - 18:10
   **   ~~~   ** The solution for one or more of the Air Loop HVAC systems did not appear to converge
   **   ~~~   ** Air System Named = 118129 AHU did not converge for mass flow rate
   **   ~~~   ** Check values should be zero. Most Recent values listed first.
   **   ~~~   ** Demand-to-Supply interface mass flow rate check value iteration history trace: 0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,
   **   ~~~   ** Supply-to-demand interface deck 1 mass flow rate check value iteration history trace: 0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,0.623022,
   **   ~~~   ** Air System Named = 118129 AHU did not converge for energy
   **   ~~~   ** Check values should be zero. Most Recent values listed first.
   **   ~~~   ** Demand-to-Supply interface energy check value iteration history trace: 13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,13140.964393,
   **   ~~~   ** Supply-to-demand interface deck 1 energy check value iteration history trace: 20032.830217,-20032.830217,20032.830217,-20032.830217,20032.830217,-20032.830217,20032.830217,-20032.830217,20032.830217,-20032.830217,
   



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