Classic Debugger limitations - Explanation requested

[Former Member]

Hello Experts,

I'd really appreciate if one can explain me (in its true sense) what is meant by the following statements:

With the classic debugger it is generally not possible to analyze prgrams in debugging mode that run in ABAP processor unit and are called recursively from subordinate unit. For example, a conversion exit cannot be analyzed using this debugger if it runs within a WRITE statement - The debugger in this case is called recursively from within itself.

I am not able to understand what is meant by subordinate unit here and also how can I reproduce this in the system. Meaning what statements should I execute in the system to see it happening before my eyes.

Thanks a lot!

Amiya

[rajesh_paruchuru]

>

> Hello Experts,
> 
> I'd really appreciate if one can explain me (in its true sense) what is meant by the following statements:
> 
> With the classic debugger it is generally not possible to analyze prgrams in debugging mode that run in ABAP processor unit and are called recursively from subordinate unit. For example, a conversion exit cannot be analyzed using this debugger if it runs within a WRITE statement - The debugger in this case is called recursively from within itself.
> 
> I am not able to understand what is meant by subordinate unit here and also how can I reproduce this in the system. Meaning what statements should I execute in the system to see it happening before my eyes.
> 
> Thanks a lot!
> Amiya

REPORT  zytest1.
DATA:
  w_matnr TYPE matnr VALUE '1234'.

WRITE : w_matnr.

Place a break point at the WRITE statement, debug the code(F5) in both classic and new debuggers and the see the difference for yourself.

- Rajesh.

[Former Member]

Rajesh,

That was wonderful! Thanks a lot. I was able to see the difference and generate exception RPERF_ILLEGAL_STATEMENT

I have more questions. Why the followingpiece of code doesn't work like yours. I was trying that piece of code.

DATA v_general TYPE num10 VALUE '0000154633'.
WRITE v_general USING EDIT MASK '==ALPHA'.

..and does the subordinate unit mean the 'Kernel' here?

Thanks for you response!

Amiya