We did converse on the legacy PB application with version 7 to version 2019. Everything is OK. The application can run on my VDI (Windows 10), no problem but when I deploy it to user's VDI machine (Windows 10 installed) . The user got the error message "Login Failed" all the time , although he can login to database on the old legacy application (version 7) without any problem (same ID and password). He has the same version of ASE as my VDI (version 15.xx.xxx). The new application is installed on network drive, user's machine has only its shortcut. Do you have any ideas why it's happened ? . Thanks.