Hi
In Mach3 version 3.043.062 I perform command G01 X1 F1000 in direct mode
The machine moves to X1.000 but the readout on the screen is suddenly X+0.998

This started today and after I have been calibrating all axis.
Now I try to calibrate back to the same distance that I asked to move but still screen differs from my input when I try to make a direct move!

Even when I Run a program for example Z-0.5 the display shows Z-0.4998

Can anyone figure out this and help me out?

Don't worry about it, it's rounding error and isn't cumulative.  The "error" is of the order of microns.

The strange thing about this is that it hasn't been like this before.
If I issue a command to move z-0.5 it moves z-0.5 and showed z-0.500. For several years there was no rounding error!
How can I get rid of these errors?
I issued, right now G01 Z-0.500 and it shows Z-0.4982
That is a "rounding error" of 3.6/1000
I believe this is to much, and since it never been seen before I think there is a problem  and I would like it to be solved!

In my work with Mach3 I rely on the numbers in the display and I work with them for calulations to next step...

Inches or mm?

If you recently recalibrated your axes and you do not have whole number for steps per, the "error" is what you will see .
My machine is metric and I edited my screens to display only two decimals.
Rounding errors are quite normal.

NEVER rely on displayed coordinates for further calculation. You should always use your CAM software for generating G-code.

My set is metric.
Thank you for all your efforts!
Now the question is how and where to edit so I only have two decimals...