Had some code doing strange things.  This is the example:

     IF VAR1 = "UNKNOWN" THEN *

  CALL SEND.EMAIL(ORDER.NO)

  do other things     

There was no END statement.  My best guess was that U2 considered the "*" at the end as a NULL and allowed it to compile.

Does anyone know?

We changed it to be the following to solve the problem.

     IF VAR1 = "UNKNOWN" THEN

      CALL SEND.EMAIL(ORDER.NO)

      END

  do other things     

Hi Nelson,

It does look to treat it as a NULL based on using VLIST. See below.

>COPYP BP N1 N2 (TSN

     N1
      VAR1 = 100
      IF VAR1 = "UNKNOWN" THEN *
   END

     N2
      VAR1 = 100
      IF VAR1 = "UNKNOWN" THEN NULL
   END
>VLIST BP N1
Main Program "BP.O/N1"
Compiler Version: 11.3.0.0
Object Level    : 5
Machine Type    : 0
Local Variables : 1
Subroutine args : 0
Unnamed Common  : 0
Named Common Seg: 0
Object Size     : 28
Source lines    : 3
Object Date Time: 30 APR 2024 10:33:25

00001:       VAR1 = 100
00001 00000 : 0F8 move           100  => VAR1

00002:       IF VAR1 = "UNKNOWN" THEN *
00002 00006 : 06E eq             VAR1 "UNKNOWN"  => $R0
00002 0000E : 2DE testfw         $R0 0001A:
00002 00018 : 10C nop

00003:    END
00003 0001A : 190 stop
>VLIST BP N2
Main Program "BP.O/N2"
Compiler Version: 11.3.0.0
Object Level    : 5
Machine Type    : 0
Local Variables : 1
Subroutine args : 0
Unnamed Common  : 0
Named Common Seg: 0
Object Size     : 28
Source lines    : 3
Object Date Time: 30 APR 2024 10:33:25

00001:       VAR1 = 100
00001 00000 : 0F8 move           100  => VAR1

00002:       IF VAR1 = "UNKNOWN" THEN NULL
00002 00006 : 06E eq             VAR1 "UNKNOWN"  => $R0
00002 0000E : 2DE testfw         $R0 0001A:
00002 00018 : 10C nop

00003:    END
00003 0001A : 190 stop