tringsAsFactors<span class='op'>=</span><span class='cn'>FALSE</span><span class='op'>)</span>

<span class='fu'>check_tu_tudtc_across_visit</span><span class='op'>(</span><span class='va'>TU</span><span class='op'>)</span>
</div><div class='output co'>#&gt; [1] FALSE
#&gt; attr(,"msg")
#&gt; [1] "There are 2 TU records where the same date occurs accross multiple visits. "
#&gt; attr(,"data")
#&gt;   USUBJID      TUDTC VISIT
#&gt; 1       1 2016-06-01  C1D2
#&gt; 2       1 2016-06-01  C2D1</div><div class='