Errm.. Not really possible. I just used my diplomat to diffuse the situation, but next turn Ptolemaioi decided that they did not want peace and attacked another settlement (and were soundly driven off)

HOWEVER!!! I have a similar problem, where Kyrene is under siege and the army from the fort can't get near the city. The green circle will not show any closer than 1.5 squares from the city. This time I have a save file, and can Email it to you, if you can drop me your Email address.

/Sygrod