🚀 go-pugleaf

I have a file from a client that had  a transparent colour in part of the image which was created in Ill 9.2  When printed the transparency appeared with translucent blocks around it.  I removed the transparency by changing the opacity back to 100% but the object still appears transparent.  Have tried closing file and reopening.  Have tried copy paste the object to a new file.  Have tried using defaut black and white but still translucent.  Have tried removing any style but still there.  Have checked the appearance palette and it shows as default transparency which means it should be 100% opaque.  Can anyone come up with a solution to this problem.  It still prints as transparent with blocks around it.  Have had this problem before but usually changing the opacity fixes it but not this time.  HELP Janette