Setting the value for &FORMAT to a value greater than 4 causes errors when the coverage, grid or TIN is projected with the PROJECT command or when the coordinate system is defined with the PROJECTDEFINE command.
This issue is a known limit in ArcInfo Workstation.
The &FORMAT directive sets the number of decimal places or precision of real numbers such as coordinates, tolerances and distances displayed by ArcInfo Workstation. The default value for &FORMAT = 3.
Numeric values are displayed to three decimal places:
Reset the &FORMAT value to either 3 or 4:
Arc: &format 3