Hi
I suspect that a bug has crept into Mach2 RC 7 (I know not when). If you set up a Tool or Fixture on Tables screen and click the relevant button to save/make it persistent then you get the dialog box with already saved tools/fixtures but the entry for the tool/fixture defined in the DROs is not loaded with data and so is not easy to save. You have to type values into dialog to save them. At one time the values were put in the dialog grid from the Tables screen DROs.
Best wishes
John Prentice