My problem is resolved. Sorry for the delay in responding. Other issues commandeered my attention. Please see the image and explanation below.
I finally got a chance to take the advice of Ludek Uher and compare the configuration of the two reports once again. I found that the malfunctioning report was using the table from the lower Shipping node under Available Data Sources, whereas the functioning report was using the table from the upper Shipping node under Available Data Sources. I thought I had previously configured both reports the same way, but apparently my changes did not stick or later reverted. In any case, both reports now print as required. Thanks to all for the help.
Michael