This was in single player endless. I haven't gotten to play multiplayer yet since I don't have internet at home.
The building is the bank building on the South East Corner of Apollo Dr. and Main St. The cemetery is directly West, and a small wooded area is directly South, and then the river. The box alarm panel in question is on the east face of the building, and was the Southern panel, the one to the right of the doors.
The building had been on fire as a call, which had then set off the box alarm. I did put all fires out prior to attempting to reset the box.
When I clicked my selected ff on the box, the ff ran South to the corner of the building, then West along the building and off the concrete, and just past the first line of trees he got stuck.
I tried with 3 ff, 2 ff with sbca, and 2 bc's, all same thing. Ended up shooting them and calling the MCU. Then I got called in to work, so I had to quit.
I wish I had thought of a screenshot. So far, I have only had the call once, and I didn't even think to write down the exact call. I will do that in the future.
I am new to the modding thing, I have been playing around with lighting in the editor, but havent done anything else myself yet. I did not change any of the lighting in the Harbor City mod, only in the LA mod and the London mod. I don't know if any of that makes a difference.
It is also possible that performance issues of my PC are to blame, my system is ANCIENT. The mod runs kinda slow, but has otherwise been fine.
Finally, I apologize or taking a while to get back here, work fun times with a downed truck (HA!).
Thanks again for the great mod, and for taking the time to respond to my issue.