List index out of bounds (0)

Dragged file from NetBeans to WinSCP remote dir panel. Intended copy operation.

WinSCP 5.7

Error message:
List index out of bounds (0)

Stack trace:
[017035F5]
[017035F5]
[017B9AAA]
[017DF35B]
[01720678]
[76CE8E6F] USER32.DLL.CallNextHookEx
[76CE90CC] USER32.DLL
[76CEA66A] USER32.DLL
[76CEA6DB] USER32.DLL.DispatchMessageW

Thanks for your report.
I have sent you an email with a debug version of WinSCP to address you have used to register on this forum.