<Try to describe precise steps that lead to the problem (where do you click, what keys do you press, what do you see, etc.)>
<If relevant, consider attaching a session log file or a screenshot)>

WinSCP 5.7.5

Error message:
Division%20by%20zero%0D%0A%0D%0AStack%20trace%3A%0D%0A%28006487F3%29%20%0D%0A%28007E39EA%29%20%0D%0A%28007E5A52%29%20%0D%0A%28007E29CC%29%20%0D%0A%280005A466%29%20ntdll.dll%0D%0A%280000F12E%29%20ntdll.dll.KiUserExceptionDispatcher%0D%0A%280007812A%29%20%0D%0A%280070E6F5%29%20%0D%0A%28006488CB%29%20%0D%0A%280064862C%29%20%0D%0A%2800714965%29%20%0D%0A%28007175B0%29%20%0D%0A%2800722A99%29%20%0D%0A%280001C74F%29%20%0D%0A%280003F30B%29%20%0D%0A%28003E869F%29%20%0D%0A%28003E423E%29%20%0D%0A%28003D9662%29%20%0D%0A%28003FEF4F%29%20%0D%0A%280034021C%29%20%0D%0A%28000152F7%29%20USER32.dll%0D%0A%2800015D35%29%20USER32.dll%0D%0A%28000167BF%29%20USER32.dll%0D%0A%2800016885%29%20USER32.dll.DispatchMessageW%0D%0A%0D%0A%28007E4055%29%20%0D%0A%28007E562F%29%20%0D%0A%2800648720%29%20%0D%0A%280064862C%29%20%0D%0A%2800714965%29%20%0D%0A%28007175B0%29%20%0D%0A%2800722A99%29%20%0D%0A%280001C74F%29%20%0D%0A%280003F30B%29%20%0D%0A%28003E869F%29%20%0D%0A%28003E423E%29%20%0D%0A%28003D9662%29%20%0D%0A%28003FEF4F%29%20%0D%0A%280034021C%29%20%0D%0A%28000152F7%29%20USER32.dll%0D%0A%2800015D35%29%20USER32.dll%0D%0A%28000167BF%29%20USER32.dll%0D%0A%2800016885%29%20USER32.dll.DispatchMessageW%0D%0A%0D%0A%28007E4055%29%20%0D%0A%28007E562F%29%20%0D%0A%2800714C7C%29%20%0D%0A%28007175B0%29%20%0D%0A%2800722A99%29%20%0D%0A%280001C74F%29%20%0D%0A%280003F30B%29%20%0D%0A%28003E869F%29%20%0D%0A%28003E423E%29%20%0D%0A%28003D9662%29%20%0D%0A%28003FEF4F%29%20%0D%0A%280034021C%29%20%0D%0A%28000152F7%29%20USER32.dll%0D%0A%2800015D35%29%20USER32.dll%0D%0A%28000167BF%29%20USER32.dll%0D%0A%2800016885%29%20USER32.dll.DispatchMessageW

Status: not_matched

The problem happens rarely. I cannot reproduce it.