Hi Ken,
I found the case that you raised for this issue (66088)
In that case you worked with barmi15. The following was added before the case was closed:
The documentation specifies that the syntax he was using for identifying files
%Y%m%d.log applies to Directories.
Unfortunately the syntax does not apply for files
We explored and confirmed that he should be able to use another file pattern that meets his needs, for example 2017*.log or 201*.log
We agreed that there is no technical issue regarding the actual and stated function of the product.