Hi, I need help please, i used a vector created in illustrator & copy pasted it into Indesgn, when i went to print, some elements of this didn't print,the pdf viewed correct on my side, but on the printers side the items was missing on the pdf and the actual print, i changed the colour from white to cyan and back to whiteand the problem was solved. How do i prevent this from happening, and how do i pick it up before it goes to the printer?