Error with context mapping

Dear All,
I am a novice to webdynpro. I have tried to create a program using MVC concept. Here is the below components that I have created while
I was referring to an example mentioned in WEBDYNPRO ABAP by U Hoffmann.
I have encountered a run time error which I am not able to resolve. Can anyone please help me out in this regard.
Below is the error description I have received.
Node UNITS Is Already Mapped.
Below is the description of the components that I have created.
Component 1- Model Component Contains the ROADMAP context node and 'UNITS' context node. This Units context node further has a tree structure with lower level node containing from and to unit nodes. I have provided a supply function for these 2 lower level nodes. Also I have declared the units context node as Interface node.
Component 2- View Component_Sub
This component contains the Units context context node and a view which is embedded in the window.
Component 3- View Component_main
This component contains the same Units context node and a roadmap node declared in component 1.
I have created a view which uses roadmap node. Also it contains a view container UI element. In window section I have embedded the view of Component 2.
Context node Units of component 3 is externally mapped with context node of component 2.
Component - 4- Main Component.
Again this contains same context nodes as mentioned in component 1 which is mapped to the context node of Model Component.
Data from Component 1 is externally mapped with context node of Main component. Context node of Main component is again mapped with context node of Component 3.
When I execute the program. I am the error as 'NODE IS ALREADY MAPPED'.
Sorry If I have repeated the same problem mentioned in another thread.I have searched for this particular problem on internet and could not find any solution for this.
It would be of great help if someone can provide me the solution for this problem.
Thanks in advance.
Regards,
Girish

Hello,
There should be something that could correlate the Invoice_Header/Key and Invoice_Line/Key. In your example, both are the same for the first and data set. If the sample looks like the one below, it is possible to sort things by correlating the Invoice_Header key and Invoice_Line key
<Invoice_Header>
<Key>000<Key>
</Invoice_Header>
<Invoice_Line>
<Key>000<Key>
</Invoice_Line>
<Invoice_Line>
<Key>000<Key>
</Invoice_Line>
<Invoice_Header>
<Key>001<Key>
</Invoice_Header>
<Invoice_Line>
<Key>001<Key>
</Invoice_Line>
An example mapping could look like this
For Header
Invoice_Header --> Header_Invoice
For Line
/InvoiceLine/Key --> removeContext --> splitByValue:valueChanged --> Invoice_Line
The subfields of the invoice line would also follow a similar logic, you just need to use formatByExample --> splitByValue:eachValue so that the context levels are the same.
Hope this helps,
Mark

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In your BPM you will have a Transformation step....the mapping included here will have three source messages (File1, File2, File3) and there will be a single target message which will have the below structure:
<ROOT>
<OUTPUT> ...... 0..unbounded
</ROOT>
OUTPUT node of the target should be duplicated (right-click --> duplicate ... in message mapping).....do it twice so that you will have three OUTPUT nodes.
Now each target-OUTPUT node should be mapped to the source OUTPUT node, respectively.
Regards,
Abhishek.

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a) From Customer to SAP
1. We are unable to open some massage mapping, it is throwing
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***) 05.02.2009 - 12:34:33 CET - Reply by SAP
The patch has been released at the Service Marketplace.
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     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
     at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:94)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:144)
/code

Hi Helmut,
I face exactly the same problem with NW 2.0.7.
It is a bug in WebDynpro runtime.
Good news is that it is fixed with SP9, so this functionality will work in final release (I believe WD team uses regression tests
Regards,
VS

Error in external context mapping

Hi
I want to send some data to a used web dynpro DC from the embedding DC. I tried using external context mapping by performing the below steps.
created a value node and attribute at interface controller of the used DC
set isInitial property to true for the value node in interface controller
created context node and attribute with same name inside component controller of the embedding DC
defined mapping between the nodes and attributes; which looks like
UsedComponentInterface----
>EmbeddingComponentController
At run time I can't find any value inside the node in used DC. The used DC interface controller node is not getting populated with data from the embedding DC component controller node value.
Can any one let me know the exact appraoch for this and where I did mistake in the above steps?
Thanks in advance
Cheers
Sudip

Hi Sudip,
First make sure in your used DC interface controller context for the nodes that you need to populate data the inputElement property is set to true. The inputElement property for a node and attribute means that the data for those nodes are going to come from and external source. Nodes where the inputElement is set to true will not be initialized even if the cardianaliy is 1:1 or 1:n. The data instance has to come from an external source.
Make sure that you create a public part for your used DC and add the component to the public part.
If the input element property is set correctly in the interface controller of the used DC make sure that the data mapping between the interface controller of the used DC and you component/custom controller is correct. The data mapping arrow should point from your used DC interface to your component/custom controller. You can see this in your data modeler. Once you create the data link the mapping window will clearly say that this is an external mapping and only inputElements can be dragged.
Once all the above are done if you add data instances to the external mapped node in your controller it will be available in your used DC context also.
Hope this helps,
Sanyev

Problem with Context in mapping

Hi.
I have a big problem with my mapping.
My input look like this.:
- <Rec>
- <raw>
<Rec_type>B</Rec_type>
<Record_data>0000340H150000006269 N2007020105070000727001000009000540006599350000000000</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000350H1500000062690000107074030000610000000060800000004910001080 80620000727001</Record_data>
</raw>
- <raw>
<Rec_type>D</Rec_type>
<Record_data>0000360H15000000626900001070740000107079030000610000000060800000004920000000727001</Record_data>
</raw>
- <raw>
<Rec_type>D</Rec_type>
<Record_data>0000370H15000000626900001070740000107432030000000000000000000000000000000000727001</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000380H1500000062690000115008010004995000000499900000041630001610 83470000727001</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000390H1500000062690000115008050003997000000400300000033320001660 83470000727001</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000400H1500000062690000115008030002996000000300000000024980001640 83470000727002</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000410H1500000062690000115008040003995000000399900000033300001630 83470000727002</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000420H1500000062690000115483010004850000000480100000040250000300 83110000727002</Record_data>
</raw>
- <raw>
<Rec_type>D</Rec_type>
<Record_data>0000430H15000000626900001154830000107432010000000000000000000000000000000000727002</Record_data>
</raw>
- <raw>
<Rec_type>D</Rec_type>
<Record_data>0000440H15000000626900001154830000107079010001453000000144000000011710000000727002</Record_data>
</raw>
- <raw>
<Rec_type>D</Rec_type>
<Record_data>0000450H15000000626900001154830000115124010003397000000336100000028590000000727002</Record_data>
</raw>
- <raw>
<Rec_type>C</Rec_type>
<Record_data>0000460H1500000062690000115502020004012000000399900000029470001240 73570000727001</Record_data>
</raw>
My target is an iDoc with this structure.:
IDOC
- E1OILT1
- - xxxx
- - xxxx
- - E1OILT2
- - E1OILT2
- - E1OILT2
- - E1OILT3
- - E1OILT3
For each B-record I'm going to produce an iDoc.
My problem is that all "C"-records shall into the first E1OILT3-segment and
all "D"-records shall into the second E1OILT3-segment.
It works well with the C-record but not with the D-records.
D is depend on C, but C dont need to have a D-record.
C could also have several D-records.
Don't know if I explained this good enough but i hope someone could give me an hint whats wrong with my context.
Thanks

then i think you need to write some JAVA code to do this.
Create a User-Defined Function.
and start using some of the ResultList Methods.
check the blogs to how to do this.
it will take you some time beacuse you need to understand the concept of Context if you don't know already.
there is some methods like "addValue" that create a new Value.
Regards,
Roi Grosfeld

Problem with CrossComponent Context Mapping with PopupWindow (web dynpro ab

The situation:
I have four views (View V1, V2, V2_popup, V3) in three Components C1, C2,C3.
View V1 is embeded in Component C1. View V2 is embeded in C2 with view V2_popup as Popup-Window.
View V3 is embeded in Component-C3. And at last the View of Component C2 and C3 are embeded in View V1.
The Problem is the CrossOver Context Mapping between the view V2 and V3.
My first way is the "direct context mapping":
I define a node in the ComponenteControllen from Component-C2 as interface and use it over the ComponentenController
from Component-C3 in view-V3. Now I bind an attribute of the mapped node to an ui-element (e.g: inputfield),
but the output of the Field is empty.
The second way is, that I define an external Mapping for this situtation.
I define a node in the componente-controllen from Component-C2 (an Component-C3)as interface with the attribute "Input Element (Ext)".
Than I map the two nodes with a node from Component-C1. That's works fine.
BUT, if I execute an action (e.g. action_save)in the popup for view-v2 (V2_popup) the changings from the inputfields don't write (show)in the context of the
popup-view. I check this with the debugger. And if I close the popup and open it again, the changings are visible.
Short: If I define a node with attribute "Input Element (Ext)", I don't can read changings from
the screen in a popup-window.
How I can solve this problem???
Message was edited by:
        Maik Sturm

Hi Maik,
try this:
at first you have to instantiate all! used components in the wddoinit method of the componentcontroller in your main (c1) component.
e.g. instance of c2 Component
lr_usage_c2_comp =   wd_this->wd_cpuse_c2_comp( ).
IF lr_usage_c2_comp->has_active_component( ) IS INITIAL.
    lr_usage_c2_comp->create_component( ).
ENDIF.
and at the end set the reference:
l_ref_interfacecontroller = wd_this->wd_cpifc_c3_comp( ).
l_ref_interfacecontroller->set_usage(
    ir_usage_c2_comp = lr_usage_c2_comp ).
set_usage is a method in the c3 component controller,
METHOD set_usage .
DATA: lr_usage TYPE REF TO if_wd_component_usage.
lr_usage = wd_this->wd_cpuse_c2_comp( ).
lr_usage->enter_referencing_mode( ir_usage_c2_comp ).
After doing this the components are using the same instance and you can simply use direct mapping between the components.
Hope it helps.
regards
Christian

Mapping issue with context again

I again need help with a mapping issue. I dont know how to handle the contexts to get this working in the xi graphical mapping tool. I have previously logged a question regarding this structure but the requirements have now changed.
I have a source document that has multiple delivery line items and for each delivery line item, there are multiple handling units. Each handling unit contains the line number of the delivery line item it belongs to. This structure has been simplified below.
Source Sample
<DOCUMENT>
<DELIVERY_LINEITEM>
<LINENUMBER>10</LINENUMBER>
<MATERIAL>mat 1</MATERIAL>
</DELIVERY_LINEITEM >
<DELIVERY_LINEITEM >
<LINENUMBER>20</LINENUMBER>
<MATERIAL>mat 2</MATERIAL>
</DELIVERY_LINEITEM >
<HANDLING_UNITS>
<HU_LABEL>123</HU_LABEL>
<HU_ITEM>
<LINENUMBER>10</LINENUMBER>
</HU_ITEM>
</HANDLING_UNITS>
<HANDLING_UNITS>
<HU_LABEL>456</HU_LABEL>
<HU_ITEM>
<LINENUMBER>10</LINENUMBER>
</HU_ITEM>
</HANDLING_UNITS>
<HANDLING_UNITS>
<HU_LABEL>789</HU_LABEL>
<HU_ITEM>
<LINENUMBER>20</LINENUMBER>
</HU_ITEM>
</HANDLING_UNITS>
</DOCUMENT>
Source Structure
DOCUMENT 1..1
DELIVERY_LINEITEM 1..unbounded
LINENUMBER 1..1
MATERIAL 1..1
HANDLING_UNITS 1..unbounded
HU_LABEL 1..1
HU_ITEM 1..1
LINENUMBER 1..1
In the target structure, I need to output each handling unit along with the corresponding DELIVERY_LINEITEM material. Target structure has been simplified below:
Target Sample
<DOCUMENT>
<ROW>
<PACKAGING>
<HU_LABEL>123</HU_LABEL>
</PACKAGING>
<PACKAGING_ITEM>
<LINENUMBER>10</LINENUMBER>
<MATERIAL>mat 1</MATERIAL>
</PACKAGING_ITEM>
</ROW>
<ROW>
<PACKAGING>
<HU_LABEL>456</HU_LABEL>
</PACKAGING>
<PACKAGING_ITEM>
<LINENUMBER>10</LINENUMBER>
<MATERIAL>mat 1</MATERIAL>
</PACKAGING_ITEM>
</ROW>
<ROW>
<PACKAGING>
<HU_LABEL>789</HU_LABEL>
</PACKAGING>
<PACKAGING_ITEM>
<LINENUMBER>20</LINENUMBER>
<MATERIAL>mat 2</MATERIAL>
</PACKAGING_ITEM>
</ROW>
</DOCUMENT>
Target Structure
DOCUMENT 1..1
ROW 1..unbounded
PACKAGING 1...1
HU_LABEL 1..1
PACKAGING_ITEM 1..1
LINENUMBER 1..1
MATERIAL 1..1
Note, 1 ROW in the target structure = 1 HANDLING_UNITS from the source structure.
Can anyone help me to achieve this? I do not know how to map the relevant DELIVERY_LINEITEM\MATERIAL from the source structure to the target structure.

JM,
Please find the solution. Reply back if it helps or not
http://www.flickr.com/photo_zoom.gne?id=1045178998&size=o
http://www.flickr.com/photo_zoom.gne?id=1045179010&size=o
http://www.flickr.com/photo_zoom.gne?id=1045179022&size=o
Results :http://www.flickr.com/photo_zoom.gne?id=1045179134&size=o
Code used:
for(int j=0;j<Handling_Linenum.length;j++)
for(int k=0;k<Delivery_Linenum.length;k++)
if(Handling_Linenum[j].equals(Delivery_Linenum[k]))
result.addValue(""Material[k]"");
result.addContextChange();
Best regards,
raj.

SAP XI - Mapping with Contexts

Hi Guys,
We have a problem when mapping with contexts. Couldyou please help.
What we are trying to achieve is if PARVW = X then map name2 to name2. We have done this all the way down the DT_Address. The context on both input values are set to IDOC.
The problem is that when all the fields are in a particular segment occurence then it maps perfectly. But on numerous occurrences of E1EDKA1 various fields are missing i.e.name2 or pstl2 etc. What we want to happen is if the field doesnt exist in that particular occurrence then just leave blank and dont map. What is happening instead is XI keeps looking for this field and maps the first occurrence it can find of it. So we end up with like 6 occurrences of the same thing.
Is their a way to specify that only map the fields if it is within the same occurrence as the qualifier. So basically Name2 follows PARVW to the same occurrence.
Also is their a way of making it so we dont get
Name
Name
Name
Id
Id
Id
Address
Address
Address
And instead get
Name
Id
Address
Name
Id
Address
Name
Id
Address
Thanks people

Hi Thanks for your input.
It was a little to do with the context but in the end I had to put another element in the target structure. So it went
Customer 0-unbounded
        customerAddress 1-1
                   Details 0-1
                   ETC 0-1
                   ETC 0-1
I mapped the customer to E1EDKA1
I mapped customer address to a constant
and the details I ampped as before but with no context.
This seemed to work.... I have no idea why but it did work. If anybody could explain the why, I would appreciate it.

Error in messege mapping " Structure with min!=max without mapping"

Hi Experts,
got an error in messege mapping, after mapping was done as " Structure with min!=max without mapping" . Any idea what is my mistake!
Points will be rewarded.
Thanks and Regards,
Arnab.

Hi Mohd,
This error pops up when your mapping is incomplete...
First check all the fields are mapped....
and check all the required fields are mapped which are in RED in colour...if not map to the specific field or to a constant or disable that one...and check the type of the sourse and target fields.....is it string,floatetc
you got a element, which occurences (=minOccurs & maxOccurs) are unequal.
Those fields have to be mapped.
http://help.sap.com/saphelp_nw04/helpdata/en/02/9a6a1c244411d5b2e30050da4c74dc/frameset.htm
Reward points if this helps
Regards
Pragathi.

Error with context mapping

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