Unexpected winscp.exe termination

Hi,
I made a program in .NET where I use the WinSCP assembly and sometimes I get a WinSCP error like in the figure. I attach the WinSCP logs. What causes this error?

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

Hi Martin,
finally I compiled my program with the winscp debugger sent me some days ago. I send you the relative logs after I used the program for a little bit.
Many thanks for your support.

Thanks. Though I need the trace logs from the debug build. And mainly trace logs of the crash. I seems that you haven't reproduced the crash with the debug build. Have you?
I do not understand the part about "problem to open the application".

Hi Martin,
The "problem to open the application" is connected to the crash. My program starts an "application" that creates files. Then I open the connection with the ftp server, copy the files and close the connection. Sometimes I get the files from the server, so I open the connection, get the files and close. The crash is not frequent and it happens after many steps (open/get or put/close). With your debug build I have problem to open the "program" and to try many times the steps.
Thanks for your support.