Issue with Lightroom catalogue when importing

I have been trying to input RAW images into an existing catelogue from an OM1. I can see the import registers the number of images and lists the folders but no images show up.  When I went to the folder on my mac they were ORF extensions but had an "S" for Topaz Sharpen.  I have removed Topaz but it still did it!  Having tried several times without success, I tried to import into a new catelogue.  This worked I could see the images and T Sharpening was nowhere to be seen.  Therefore concluding that there is something wrong with the original catelogue, but what.  I have been into the preferences and can see no link to Topaz Sharpening.  I would prefer to go back to my original catelogue but need to fix this import problem.  Help!!