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.

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,
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 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,
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?