'Gers supporters have planned to boycott the fifth-round meeting at Tannadice in February 2013 because they feel the Arabs worked against the Glasgow club when their Scottish Premier League fate was being decided in the summer.
Rangers officials have now backed their fans by disregarding the ticket allocation for the fixture but that has rubbed United up the wrong way with a club statement dismissing the claims from the Ibrox outfit.
"It is with huge disappointment that we read both the content and tone of the statement from Rangers, stating that they will not be taking any tickets for our Scottish Cup tie in February and urging their supporters not to attend," read the statement.
"However, we do not intend to enter into a war of words with Rangers or to dignify their position by responding in kind.
"We have noted their decision not to take any tickets for this cup tie and will now act accordingly in arranging the match.
"The statement from Rangers makes it clear that their fans should not attend. We have therefore raised a number of related matters with the Scottish FA and will be making no further public statement until their advice has been received."