Andy Leonard reports a bug as well as a temporary workaround for BimlExpress 2018:
I had no sooner published my blog post about the coolness of Biml 2018 when I encountered a bug trying to use one of the features I really like – converting SSIS packages to Biml using (FREE!) BimlExpress 2018.
My first response was, “Durnit! This worked in the test versions.” My second response was to drop a note into an issue-tracking site Varigence set up to record these kinds of things.
And then I started getting emails similar to, “Hey Andy, I get this error when I try to use the new ‘Convert SSIS Packages to Biml’ feature”…
David Stein has a workaround for us until Varigence can fix the bug.