topic Re: OBJECTS_OBJREF_NOT_ASSIGNED in Application Development and Automation Discussions

OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 08:18:10 GMT

Hi,

I get the above error when a Z program runs in background don't know if it is a program error

I found this solution but it is not clear what to do:

http://www.slashsap.com/2012/07/runtime-error-objectsobjrefnotassigned.html

Thanks

Best regards

Re: OBJECTS_OBJREF_NOT_ASSIGNED

former_member209120 — Tue, 30 Jul 2013 08:24:44 GMT

Hi a a,

Please check OSS note 1061148

Re: OBJECTS_OBJREF_NOT_ASSIGNED

former_member213275 — Tue, 30 Jul 2013 08:26:10 GMT

Hi,

Can you paste the dump from ST22? The link which you mentioned says that the error is caused by a program with functionality of accessing a file on frontend machine and the program is ran in background because of file is on frontend machine the program fails when program tries to open the file on frontend machine. so eiher move the file to application server while running a background job.

Uploading a flat file that's sitting on a client workstation (Presentation Layer) is not possible. You will either have to execute the upload from the client workstation in foreground mode or FTP the file to the SAP BW application server and then read and load the flat file from there in background mode.

Srikanth.

Re: OBJECTS_OBJREF_NOT_ASSIGNED

venkateswaran_k — Tue, 30 Jul 2013 08:45:50 GMT

Hi,

It would be better if you paste the Dump message in order to find the error.

Secondly, as per your update,

1. In a background scheduled program, you cannot use any GUI_UPLOAD functions.

2. You cannot read file from your desktop.

Please review at above points in your program

Regards,

Venkat

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 09:11:48 GMT

Hi,

my error is "Dump objects_objref_not_assigned" and not "Dump objects_objref_not_assigned in the SUS ASN"

snote trx says the note is not implementable in my system

Thanks

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 09:21:54 GMT

I paste the error analysis

Error analysis

You attempted to use a 'NULL' object reference (points to 'nothing')

access a component (variable: " ").

An object reference must point to an object (an instance of a class)

before it can be used to access components.

Either the reference was never set or it was set to 'NULL' using the

CLEAR statement.

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 09:43:34 GMT

Hello,

First thing is check the statement on which dump has occured.

if it is an object then there will be some statement like for eg. a->b

here a stands for the object ref.

Check for the statement "create object" where this statement is called.

Now using JDBG, run the same job and check if statement "create object" is getting called or not.

If it is getting called then the reference create is cleared either by free object command.

Hope this helps.

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 11:23:11 GMT

Hi,

this is the statement where the program fails:

FUNCTION DP_CONTROL_ASSIGN_TABLE.

What do you mean about "using JDBG"?

Thanks

Regards

Re: OBJECTS_OBJREF_NOT_ASSIGNED

RaymondGiuseppi — Tue, 30 Jul 2013 11:34:49 GMT

Read Starting and Directly Debugging ABAP Programs in online help.sap.com, look for

Background Jobs:
In the job overview (SM37):
 Select an inactive job. 
 Enter jdbg in the command line of the system function bar.

But did you look in your z-program for GUI function/class not available ion background ?

Regards,

Raymond

PS: Read text description of FM DP_CONTROL_ASSIGN_TABLE : "Assigning a Structured Table to a Control".

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 11:45:00 GMT

Hello,

Kindly read this post:

http://scn.sap.com/thread/1067064

Is this the reason for your problem?

Is your report running fine when executing in foreground?

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 12:00:20 GMT

Hello,

Can you please paste the Dump message here,so that we can help you much better.

Thanks

Katrice

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 12:25:20 GMT

Yes, when running in foreground the program runs correctly

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 12:59:41 GMT

Hello,

Error analysis is:

"You attempted to use a 'NULL' object reference (points to 'nothing')

access a component (variable: " ").

An object reference must point to an object (an instance of a class)

before it can be used to access components.

Either the reference was never set or it was set to 'NULL' using the

CLEAR statement."

Regards

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 13:23:42 GMT

Ok but this error is in Z program or in a standard program?

Re: OBJECTS_OBJREF_NOT_ASSIGNED

RaymondGiuseppi — Tue, 30 Jul 2013 13:31:16 GMT

You write yourself

I get the above error when a Z program runs in background

So someone in your system used a control oriented FM without checking GUI availabiliy (would not be the first...) this FM starts with a DP_CREATE FM which check if JAVA-GUI or WINDOWS-GUI is available...

Regards,

Raymond

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 14:35:09 GMT

The most likely cause for your program to fail in background mode is the fact that you're currently employing static methods such as:

cl_gui_frontend_services=>directory_browse

cl_gui_frontend_services=>directory_exist

cl_gui_frontend_services=>directory_create

cl_gui_frontend_services=>gui_download

Since these methods directly trigger according actions in the SAP GUI (aka frontend) e.g. they check the existence of a directory (directory_exist) in the filesystem of the frontend system (which is the PC that actually runs your SAP GUI).

When you run such a program in batch mode there is no such thing as a frontend (or SAP GUI) - which is the explanation why you get an invalid reference (null) when you use such a method in batch mode.

To solve this issue you should track all cl_gui_frontend_services method calls and find suitable function modules to replace their functionality with plain application level logic (no frontend involved, e.g. UPLOAD function module is not a good idea either)

Regards,

Chris

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Tue, 30 Jul 2013 14:39:17 GMT

I'm telling the above statement because there is also a list of standard programs in ST22 log

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Fri, 02 Aug 2013 07:40:16 GMT

Hi,

in the abap program I can read the code:

CALL METHOD CL_GUI_FRONTEND_SERVICES=>DIRECTORY_LIST_FILES

In this case what fm do I have to change?

I tried to change the above code like this:

FILE_READ_AND_CONVERT_SAP_DATA=>DIRECTORY_LIST_FILES
FILE_READ_AND_GET_TAB=>DIRECTORY_LIST_FILES
ARCHIVFILE_CLIENT_TO_CLIENT=>DIRECTORY_LIST_FILES
ARCHIVFILE_CLIENT_TO_SERVER=>DIRECTORY_LIST_FILES
ARCHIVFILE_CLIENT_TO_TABLE=>DIRECTORY_LIST_FILES

But it won't work:

The type "FILE_READ_AND_CONVERT_SAP_DATA=>DIRECTORY_LIST_FILES" is unknown.

Is there any FM which could work in a background job?

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Fri, 02 Aug 2013 10:17:05 GMT

Hi!

The problem you're currently facing is the fact that in batch mode there is no such thing as a presentation layer or frontend since your program is running autonomously in background on the application layer. And this is the reason why all your client-related calls fail.

If you look at this illustration you see a scenario where you as a user communicate with the application layer through the SAP GUI.

All the methods that you listed are relying on the SAP GUI being in place - which for batch execution is not the case.

What you could use is the following scenario:

In this scenario the file(s) that your program uses in batch mode are first put onto an FTP server from where they are retrieved via function module calls such as:

CALL FUNCTION 'HTTP_SCRAMBLE'

CALL FUNCTION 'FTP_CONNECT'

CALL FUNCTION 'FTP_R3_TO_SERVER'

CALL FUNCTION 'FTP_CLIENT_TO_R3'

CALL FUNCTION 'FTP_DISCONNECT'

Regards,

Chris

Re: OBJECTS_OBJREF_NOT_ASSIGNED

Former Member — Fri, 02 Aug 2013 11:48:28 GMT

Hi,

ok, it is clear by a basis point of view but when I change "CALL METHOD CL_GUI_FRONTEND_SERVICES=>DIRECTORY_LIST_FILES" into

"ARCHIVFILE_CLIENT_TO_SERVER=>DIRECTORY_LIST_FILES",

the program generates the error ARCHIVFILE_CLIENT_TO_SERVER=>DIRECTORY_LIST_FILES" is unknown.

Thanks

Regards