The minimum number of hits for a line is two.
Feature_name=FEAT/LINE,TOG1,TOG4
THEO/TX,TY,TZ,TI,TJ,TK
ACTL/X,Y,Z,I,J,K
MEAS/LINE,TOG3,TOG7
...
ENDMEAS/
TOG1 - This field can be toggled between RECT / POLR.
TOG3 - This value is user-editable and is determined by the feature being measured. The HIT line is varied, based on the number of hits set up by the user. For example, 2 hits = 2 HIT/BASIC lines, 3 hits = 3 HIT/BASIC lines.
TOG4 - This field can be toggled between BND / UNBND. If set to BND, the THEO and ACTL fields, no longer display the vector information, but instead show the XYZ values for the second point along with the first. See "Line Definition Format".
TOG7 - This field switches between the various reference types. These include FEATURE, 3D, WORKPLANE, XPLUS, YPLUS, ZPLUS, XMINUS, YMINUS, ZMINUS.
... - As many hits as are necessary are entered at the ellipsis.
Measured Lines and Workplanes
When creating a measured line, PC-DMIS expects the hits for the line to be taken at a vector perpendicular to the current workplane.
For example, if your current workplane is ZPLUS (with a vector 0,0,1), and you have a block-like part, the hits for the measured line must be on a vertical face of that part, such as the front or side.
If you then wanted to measure a line feature on the top surface of the part, you would need to switch the workplane to XPLUS, XMINUS, YPLUS, or YMINUS, depending on the direction of the line.
See the "Settings Toolbar" topic for Workplane for information on how to change the workplane.