using lls in script give wrong file size for large files

Hello,
When perfomring a lls command in a script, the resulting file sizes are wrong for files above about 2GB. Often the file size shows as a negative number. The ls command shows the correct value, and dir from windows shows the correct value. Do you have an idea of how to get the correct file size when doing lls ? Alternately, is it possible to invoke a local command (!dir for instance)?
Thanks,
Shaun

Thanks for your post.
This seems to be fixed in 5.0 beta. Can you confirm?

Version 5 beta seems to be working, giving the correct file size when using lls on large files. Are there any other bugs in 5 that should make me hesitate before using this in my scripts?
Thanks Martin,
Shaun

I'm not aware of any bugs in 5.0.6 except those listed in the "not released yet" section of version history:
https://winscp.net/eng/docs/history