Commented by: @cincuranet

Yes. The problem is what to do with trailing comment with no command... It might be some custom hint to be handled i.e. in UnknownStatement event.

And also. You can set the UnknownStatementArgs.Ignore and it's solved.

Commented by: Ralf Jansen (ralf jansen)

Yep. That helps also. Thanks.

Workaround:

FbScript fbscript = new FbScript(upgradeScript);
fbscript.UnknownStatement += (sender, args) => { args.Ignore = true; };
fbscript.Parse();

Commented by: @cincuranet

OK. I have also added notice about the event to the exception message.