v9.0 to v9.1b

[plant]

If I open a source file (generated by V9.0) in v9.1b and save it.
Then compile it in Webspeed 3.1 workshop.

Error: Unable to understand after "DEFINED"

When I opened the source file in a text editor, I found that

For each procedure
it will automatically insert two lines wrapping the procedure definition in this way
.

&IF DEFINED(EXCLUDE-correcting_form) = 0 &THEN

procedure correcting_form
------
end procedure.

&ENDIF

The source file generated by V9.0 does not have "&IF DEFINED(EXCLUDE-correcting_form) = 0 &THEN" and "&ENDIF".

Why Webspeed 3.1b does not recognize the code v9.1b automatically generates.

Thanks