Unidata debugger command

Hello - I'm running the debugger on a unidata program and need to set a variable to null. I remember there is a way to do this but do not remember how. I know you can always set a variable to a value through the \\ command...but to set to null. I'm remembering something like save or sv...can't quite remember. 

Can anyone help here?

Kathleen

Use the SV command as covered in the manuals to Set Variable

Attached a copy of the manual for you as well.

001: VAR = "HELLO"
002: CRT "VAR = "  : VAR
003: DEBUG
004: CRT "VAR = "  : VAR
005: END

:RUN BP TEST20
VAR = HELLO
***DEBUGGER called at line 3 of program BP\\_TEST20
!\\VAR
VAR=HELLO
Enter new value (hit <CR> for no change)=
!SV VAR ""
!G
VAR =

------------------------------
Jonathan Smith
UniData ATS
Rocket Support
------------------------------

Hello - I'm running the debugger on a unidata program and need to set a variable to null. I remember there is a way to do this but do not remember how. I know you can always set a variable to a value through the \\ command...but to set to null. I'm remembering something like save or sv...can't quite remember. 

Can anyone help here?

Kathleen

The SV command doesn't seem to work on attributes, MVs, or SVs...only full variables. Can I set a single attb of a dynamic array to null using the SV? Some other command? I'd like to make rec<5> null for instance while in the debugger.

Kathleen

SV cannot set an attribute etc within an array, it is just for a variable.

It is possible to do what you wish, although it's not documented

001: VAR = ""
002: FOR SET.NXT = 1 TO 5
003:   VAR<SET.NXT> = SET.NXT
004: NEXT SET.NXT
005: CRT "VAR = " : VAR
006: DEBUG
007: CRT "VAR = "  : VAR
008: END

:RUN BP TEST20
VAR = 1þ2þ3þ4þ5
***DEBUGGER called at line 6 of program BP\\_TEST20
!\\VAR<3>
VAR<3>=3
Enter new value (hit <CR> for no change)= (For the new value I enter space)
!G
VAR = 1þ2þþ4þ5
:

------------------------------
Jonathan Smith
UniData ATS
Rocket Support
------------------------------

Thanks Jonathon - that seemed to work. But it does beg the question...if a space clears the multi or subvalue, then what sets it to just a space?

Begs an answer as you didn't try it 

RUN BP TEST20
VAR = 1þ2þ3þ4þ5
***DEBUGGER called at line 6 of program BP\\_TEST20
!\\VAR<3>
VAR<3>=3
Enter new value (hit <CR> for no change)= (Two spaces entered)
!G
VAR = 1þ2þ þ4þ5
: