when specifying a region as a float without leading zero, the parser will fail, e.g. as below.
(github version). This is probably an uncommon use case, and not a high priority concern, but might be nice to have a more robust handling? (though I can also see how there are other special cases to consider). Thanks!
echo | xyz2grd -R.5/1/.5/1
xyz2grd [ERROR]: Programming error. Please report the situation when it occurred.