I have finally found it. After switching to new drives, the old problem came up again. I had thought it to be solved by simply copying the db, px amd mb files to another folder.It turns out that only worked because it was a smaller drive, so Footpad was right in his assessment that bde does not recognize large drives. The W2K cd contains the file apcompat.exe. Once installed it can be run for Paradox. Click on drives larger than 2 gb and click on "make these changes permanent". As easy as that.