AutoCAD 2013 :: Command Copy Sets Base Point To 0 / 0 / 0 And Objects Vanish

Using the Copy(multiple) command button with the following sequence (working correctly): Copy command, window objects to copy, right click to close selection, pick base point,

pick new location point(s),...right click to close the command.But sometimes it decides to do this: Using the same Copy(multiple) command button with the following sequence (not working correctly):

Copy command, window objects to copy, right click to close selection, pick base point..At this point the copy comand closes out.  It has assumed a single copy, 0,0,0 base point

& tossed the copied objects out in model space accordingly. But as stated it only does this periodically.