When starting a new airport with only GA traffic activated, I often receive the message XXX cannot land due to the following: Runway does not accept aircraft size."
The runway currently only accepts small aircrafts. Obviously also bigger GA planes try to land but cannot and consequently cause the mentioned error.
These aicraft stay in the "aircraft arriving" list and are not deleted after some time. Due to that I cannot fast forward to next day and no new small GA-aircrafts spawn.