DBDOC-CHECK X COORDINATE ORDER.ERR

This message means that co-ordinates may be out of order for certain function codes. The x co-ordinates S2, S4, S6 etc. should have values in ascending order. The function generator implementation in the "controller" (the logic in a module) is very simple-minded. Essentially, the algorithm, given successive (x,y) pairs (x1,y1), (x2,y2), (x3,y3), (x4,y4), (x5,y5), (x6,y6) is as follows:

If input is less than x1, output is y1
If input is less than x(i), output is the linearized value using the line (x(i-1),y(i-1)) , (x(i),y(i)), which does not give the result people expect if the x coordinates are not in ascending order.
If input is greater than x6, output is y6.

For example

X co-ordinates out of order for F(x) Module 12,52,05 Block 3503.
( S2, S3)          0.0        100.0
( S4, S5)         10.0        660.0
( S6, S7)         20.0        660.0
( S8, S9)        300.0        500.0
(S10,S11)         40.0        200.0
(S12,S13)         50.0        100.0

The F(x) looks like this:

image:fc001 out of order.png

Here's another example:

image:no tool error reports 75.png

This error can be built directly into Hyperview. For more information, see the article Building error reports into the M14.