Need a Bapi to Create a purchase order

Hi experts,
Is there a Bapi, to create a 'Purchase Order' from an existing Purchasing document no. marked for deletion.
Thanks in advance ,
Hrashit Rungta

Hi Experts,
I have used BAPI_PO_CREATE1 to create a purchase order .
I have successfully created a purchase order when i use this BAPI directly through SE37 ,
supplying the required inputs.
But now i am calling this BAPI inside a program,
Supplying the same inputs as earlier.
Buit i am not able to generate a PO.
I am getting the messages in the Return Table as :|Please enter items first
No instance of object type PurchaseOrder has been created. External referen
Document contains no items
Can someone suggest What input am i missing ?
Thanks in advance,
Harshit Rungta

Similar Messages

BAPI for Creating Service Purchase Order

Hi All,
I am not able to create service po using bapi, after passing the parameters
ls_polimits-LIMIT     = '30'.
ls_polimits-EXP_VALUE = '20'.
APPEND : ls_polimits TO gt_polimits.
    ls_poserv-quantity = '10'.
    ls_poserv-base_uom = 'AU'.
    ls_poserv-short_text = 'AAAAAAAA'..
    ls_poserv-price_unit = '1'.
    ls_poserv-GR_PRICE = '25'.
    ls_poserv-TAX_CODE = 'V0'.
    ls_poserv-MATL_GROUP = '6AD'.
    APPEND : ls_poserv TO gt_poserv,
           ls_poservx TO gt_poservtxt.
message getting is
500000280 00010 Purchase order still contains faulty items
500000280 00010 No instance of object type PurchaseOrder has been created. External reference:
500000280 00010 Please maintain services or limits
please help me
Appropriate points will be rewarded.
Arun

Dear Seshu,
This is not the problem with data, coz, i am able to create the PO (Service) Manually.
please let me know what all tabeles, i need to pass for this BAPI_PO_CREATE1
presently I am passing
CALL FUNCTION 'BAPI_PO_CREATE1'
       EXPORTING
            poheader          = g_pohdr
            poheaderx         = g_pohdrx
           testrun           = 'X'
       IMPORTING
            exppurchaseorder = l_ponum
       TABLES
            return            = lt_return
            poitem            = gt_poitem
            poitemx           = gt_poitemx
            poaccount         = gt_poacct
            poaccountx        = gt_poacctx
            POSERVICES        = gt_poserv
            POSRVACCESSVALUES = gt_poservacc
Regards
Arun

Create a Purchase order using the BAPI using the data in the XML file.

Hello Gurus,
here is the scenario can anyone help me how to proceed explaining the procedure?
Create a Purchase order using the BAPI using the data in the XML file.
comprehensive explanations are appreciated.
thanks in advance.

hi,
first use fm "bapi_po_create".
then use fm "BAPI_ACC_GL_POSTING_POST"
The demo environment was made with real business scenario in mind, but following subjects need to be addressed in a live implementation:
     No exceptions and error handling is implemented, except the order rejection (e.g. partly delivery);
     In Navision both XML Ports and the XML DOM has been used to integrate with SAP XI, because XML ports has some drawbacks regarding to Namespaces in XML Documents (mandatory in SAP XI);
     A minimum of SAP and Navision customization is required to implement this solution. (e.g. user exit in SAP, Navision XML DOM).

How create a purchase order without imputation using bapi: BAPI_PO_CREATE1

Hello Forum
I have an request for purchase order with imputation K (cost center, EBAN-KNTTP). During the liberation of the request for purchase order, and using the Bapi: BAPI_PO_CREATE1, I want to create a Purchase Order without imputation (imputation empty or charge empty).
The system displays the following error: The request for purchase order, item (position) 10, is attributed to another order...
I imagine that is because the request for purchase order has imputation (charged) K and the purchase order will have no type of imputation (imputation empty).
However, manually, Yes, I can create the purchase order. That is, I first release, the request for purchase order. Then I create the order of purchase using ME21 and with reference to request for purchase order, and when SAP returns the items of the request for purchase order, I manually remove the imputation K, and these items to become the purchase order.
Please support me want to know how to resolve this case, why can not I create a purchase order without imputation to from the request for purchase order with imputation K, using Bapi
Thank you.
Greetings,

Hi,
In the item overview of the purchase order creation screen (ME21N), you have a column Purchasing Doc and next it item no. You can give the existing purchase order number here with item no which will create a purchase order, and changes can be made wherever you require.
Hope this helps.
Thanks
Krishna.

Can u tell me any bapi to create the purchase req with sales order as refer

can u tell me any bapi to create the purchase req with sales order as reference?

Hi Mukesh,
You can use 'BAPI_REQUISITION_CREATE' for the purchase requisition creation if through transaction, you use transaction ME51N for creating the purchase requisition.
Cheers,
Sujay

Creating a purchase order in web dynpro for java.........

hello all,
i am new to web dynpro for java.i have already done an application
"Creating a Web Dynpro Application Accessing ABAP Functions" this application
have good document on sdn.
this application is working fine .
Now i got an requiremnt for creating a purchase order in web dynpro for java.
in normal report when i call the bapi the parameter are the header, headerx,item, itemx is an internal table.
CALL FUNCTION 'BAPI_PO_CREATE1'
EXPORTING
    POHEADER                     = HEADER
    POHEADERX                    = HEADERX
POADDRVENDOR                 =
TESTRUN                      =
IMPORTING
EXPPURCHASEORDER             =
EXPHEADER                    =
EXPPOEXPIMPHEADER            =
TABLES
   RETURN                       = RETURN
   POITEM                       = ITEM
   POITEMX                      = ITEMX.
i just want to know how can i fill these internal table in web dynpro
for java to create an application accessing "Bapi_po_create" .
Thanks

Hi Gopal,
I'm not sure what is your issue, it seems you're not really understanding how the Model structure works in WDP.
I'll assume few things here, like you know how to Import the Model into the WDP, and you know a little bit about what Java Classes will represent this Model in the Project.
Try these steps:
1. Import your Model into the Project;
2. Open your Component Modeler, create a Data Link between your Model / Component (Or Custom Controller, as you prefer)
- You can also use the "Apply Template -> Service Controler"
3. Map the Input of your Model as the Main Node, check the Input Tables (you prob. will have two, POITEM = ITEM - POITEMX = ITEMX)
4. Also, check the Return box, since this is BAPI return (You can use to display Backend messages)
Now you have the Model mapped into your Controller, you need to develop the Java function to execute it.
1. Create a new Input class, like
BAPI_PO_CREATE1_Input purchaseOrderCreateInput = new BAPI_PO_CREATE1_Input();
2. Bind your Input Node, in the Controller, with your Input Class;
wdContext.nodeBAPI_PO_CREATE1().bind(purchaseOrderCreateInput);
3. Set any Import parameters you need:
purchaseOrderCreateInput.setEXPPURCHASEORDER(XXXX);
4. To Add references to the Table, you will perform something like:
First, you need to know what "Structure" you need to add (POItem Structure) - You have a Java class that represents that Structure..
POITEM_Element poItemElement = new POITEM_Element();
poItemElement.setPROPERTY();   /// Set your Properties
purchaseOrderCreateInput.getPOITEM().add(poItemElement);
5. Execute your Input,
purchaseOrderCreateInput .execute();
Hope it helps,
Regards,
Daniel

How to create a purchase order in sapR/3

Hi,
I want create a purchase order in SAPR/3 system.so for that i need some information like
which bapi i need to run,input parameters for that bapi.Important values and how to set them.pls kindly send me the related information about that and also send me the java code to do it.

bapi for creating ourchase order is bapi_po_create.
Try run it and in return table will be error message about mandatory/wrong parameters.
For more information get documenatation about that bapi (eq. sap gui, "bapi" transaction) or ask in abap forum
Regards
Vedran

Creating a Purchase Order

Hi there,
i need to create an purchase order, heres my code:
Private Sub Gerarcompra()
        Dim i As Integer
        Dim RetVal As Long
        Dim ErrCode As Long
        Dim ErrMsg As String
        ErrMsg = "Ocorreu um erro..."
        Dim vDrafts As SAPbobsCOM.Documents
        vDrafts = oCompany.GetBusinessObject(SAPbobsCOM.BoObjectTypes.oPurchaseOrders)
        oForm = SBO_Application.Forms.Item("analprocform")
        oMatrix = oForm.Items.Item("MatrixProc").Specific
        For i = 1 To oMatrix.RowCount
            oCheck = oMatrix.Columns.Item("select").Cells.Item(i).Specific
            If oCheck.Checked = True Then
                'Set values to the fields
                vDrafts.CardCode = "V8000"
                vDrafts.HandWritten = SAPbobsCOM.BoYesNoEnum.tNO
                vDrafts.DocDate = System.DateTime.Now
                'Invoice Lines - Set values to the first line
                oEditText = oMatrix.Columns.Item("NArtigo").Cells.Item(i).Specific
                vDrafts.Lines.ItemCode = oEditText.Value
                vDrafts.Lines.ItemDescription = ""
                oEditText = oMatrix.Columns.Item("Quantidade").Cells.Item(i).Specific
                vDrafts.Lines.Quantity = Double.Parse(oEditText.Value)
                oEditText = oMatrix.Columns.Item("Preco").Cells.Item(i).Specific
                vDrafts.Lines.UnitPrice = Double.Parse(oEditText.Value)
                vDrafts.Lines.Add()
            End If
        Next
        'Add the Invoice
        RetVal = vDrafts.Add
        'Check the result
        If RetVal <> 0 Then
            oCompany.GetLastError(ErrCode, ErrMsg)
            MsgBox(ErrCode & " " & ErrMsg)
        End If
    End Sub
But in the end i got an error: "Nº Article missing...".
Thank you all for your support.
Luis Barros

change the code as
Private Sub Gerarcompra()
Dim i As Integer
Dim RetVal As Long
Dim ErrCode As Long
Dim ErrMsg As String
ErrMsg = "Ocorreu um erro..."
Dim vDrafts As SAPbobsCOM.Documents
vDrafts = oCompany.GetBusinessObject(SAPbobsCOM.BoObjectTypes.oPurchaseOrders)
oForm = SBO_Application.Forms.Item("analprocform")
oMatrix = oForm.Items.Item("MatrixProc").Specific
dim x as integer
x = 0
For i = 1 To oMatrix.RowCount
oCheck = oMatrix.Columns.Item("select").Cells.Item(i).Specific
If oCheck.Checked = True Then
x = x + 1
if x > 1 then
vDrafts.Lines.Add()
end if
'Set values to the fields
vDrafts.CardCode = "V8000"
vDrafts.HandWritten = SAPbobsCOM.BoYesNoEnum.tNO
vDrafts.DocDate = System.DateTime.Now
'Invoice Lines - Set values to the first line
oEditText = oMatrix.Columns.Item("NArtigo").Cells.Item(i).Specific
vDrafts.Lines.ItemCode = oEditText.Value
vDrafts.Lines.ItemDescription = ""
oEditText = oMatrix.Columns.Item("Quantidade").Cells.Item(i).Specific
vDrafts.Lines.Quantity = Double.Parse(oEditText.Value)
oEditText = oMatrix.Columns.Item("Preco").Cells.Item(i).Specific
vDrafts.Lines.UnitPrice = Double.Parse(oEditText.Value)
End If
Next
'Add the Invoice
RetVal = vDrafts.Add
'Check the result
If RetVal 0 Then
oCompany.GetLastError(ErrCode, ErrMsg)
MsgBox(ErrCode & " " & ErrMsg)
End If
End Sub

Get a wrong price when creating a Purchase Order in order recommendation

Dear all
    I meet a strange problem .I have already set a gross price list for Item 'A' . When I create a purchase order in Purchase Order Window,It will calculate a unit price (net price) according to the gross price list automatically .But when I create a purchase order in Order Recommendation Window,It will get a unit price as same as the gross price in predefined gross price list.They should not be equal in fact.

Dear Anna Shao
1 .Our SBO is version 2007B
2. The Decimal of Amount is 2 and that of Price is 6
3. Vat rate is 17%
4. The gross price is not small,the problem is that the difference is not small either.Sometimes it's bigger than 0.1 RMB.I can give you the example.
LineNo     ItemCode Quantity UnitPrice       VatRate      GrossPrice     LineTotal     GrossTotal
1            A     10         299.145299    J1(17%)      349.995299      2991.45      3499.95
2            A     10         299.150000    J1(17%)      350.000000      2991.45      3500.00
3            A     10         299.150000    J1(17%)      350.010000      2991.50      3500.10
If you set the unit price list for ItemCode 'A', you will get the result like row 1 above.
If you set the gross price list for ItemCode 'A' ,you will get the result like row 2 above.
If you do not set any price list for ItemCode 'A' and you just set the unit price 299.150000 in the purchase order,you will get the result like row 3 above.
The perfect one is row 2.It is just what our customer needs.So they set the gross price list for ItemCode 'A'. But another problem occured when using MRP order recommendation. It is the one why I post a thread,just as I have descripted at first
Edited by: Jianzhong Zhang on Feb 25, 2009 3:53 AM

DBIF_RSQL_INVALID_RSQL when creating a Purchase Order (ME21N)

Hi,
The system is generating a short dump DBIF_RSQL_INVALID_RSQL when a user tries to create a purchase order.
what could be the cause of this? i have analysed the short dump in st22 and looked at sm21 and st11 and they are giving very little detaill.
                                                                                Error in the module RSQL accessing the database interface.
What happened?
Error in ABAP application program.
The current ABAP program "SAPLZMM_GET_ACT" had to be terminated because one of
the
statements could not be executed.
This is probably due to an error in the ABAP program.
What can you do?
Print out the error message (using the "Print" function)
and make a note of the actions and input that caused the
error.
To resolve the problem, contact your SAP system administrator.
You can use transaction ST22 (ABAP Dump Analysis) to view and administer
termination messages, especially those beyond their normal deletion
date.
Error analysis
An exception occurred. This exception is dealt with in more detail below
. The exception, which is assigned to the class 'CX_SY_OPEN_SQL_DB', was
neither
caught nor passed along using a RAISING clause, in the procedure
"ZMM_GET_ACT_PLN" "(FUNCTION)"
Since the caller of the procedure could not have expected this exception
to occur, the running program was terminated.
The reason for the exception is:
The SQL statement generated from the SAP Open SQL Statement violates a
restriction imposed by the database system used in R/3.
Possible errors:
o The maximum size of an SQL statement has been exceeded.
o The statement contains too many input variables.
o The space needed for the input data exceeds the available memory.
o ...
You can usually find details in the system log (SM21) and in the
developer trace of the work process (ST11).
If an error occurs the developer trace often informs you about the
current restrictions.
How to correct the error
The exception must either be prevented, caught within the procedure
"ZMM_GET_ACT_PLN"
"(FUNCTION)", or declared in the procedure's RAISING clause.
To prevent the exception, note the following:
The SAP Open SQL statement must be divided into several smaller units.
If the problem occurred due to the use of an excessively large table
in an IN itab construct, you can use the addition FOR ALL ENTRIES
instead.
When you use this addition, the statement is split into smaller units
according to the restrictions of the database system used.
You may able to find an interim solution to the problem
in the SAP note system. If you have access to the note system yourself,
use the following search criteria:
"DBIF_RSQL_INVALID_RSQL" CX_SY_OPEN_SQL_DBC
"SAPLZMM_GET_ACT" or "LZMM_GET_ACTU01"
"ZMM_GET_ACT_PLN"

Hi,
Wherever you have used SQL statement please do check all the fields here as some of the fields are not in correct order as they are required per the actual table in dictonary, to just verify that you can use addition of "INTO CORRESPONDING FIELDS OF INTERNALTABLE" in your SQL statement as this will not require the fields to be in order but this may cause performance issue.
Thanks and Regards
Sudharshan

Creating a Purchase Order using ORDERS05 Idoc

Hi Experts,
I need to create a purchase order using ORDERS05 Idoc, with the data I am using a sales order is gettig created but I need to create a PO insted of SO.
Please let me know what is difference between a PO and SO while using ORDERS05. Also please let me know what are all the fields that needs to chaged in the Idoc.
Thanks,
Suma

Hi,
   I'm looking at a similar problem, can we use ORDERS05 IDOC basic type to create a Purchase Order?
   What is the inbound processing FM? I tried IDOC_INPUT_ORDRSP, but it seem to only allow changes to a PO, and not creation of a PO.
   For IDOC_INPUT_ORDERS FM this one seem to only create Sales Orders?
   Which inbound FM should i be using?
Regards.

Creating a purchase order, cost price?

hi, when im creating a purchase order and also producing an invoice for it obviously i want the item cost to be used rather the the selling price. however, for some reason the system continues to uses selling price, so when it comes to paying an invoice i need to change all the prices to the cost, which is very annoying.
many thanks.

Hi........
Please check I guess you have assigned sepping price list to the vendors. Please unassign Price List from Vendors.......
Regards,
Rahul

Creating a Purchase Order, is there any help out there?

I am creating a purchase order for our sales team that can be utilized on iOS. I have two issues:
1) Some of our sales will be exempt and will need to be toggled off. How do you go about doing this while not destroying the end total?
2) Our sales tax varies due to county's jurisdiction. Is there a way to change that once the form is ready to be filled out?
Thanks Guys
Below is how my form is being set up, mind you this is an import from excel.

I don't see a way for you to currently specify that an item is exempt...
Maybe add another column with check-boxes for the exempt status. However,
implementing this in the calculation will require a custom-made script.
As for the sales tax, you can place that in a text field as well and use it
in your calculation directly. It's even possible to set it up so that a
selection in a county drop-down will automatically populate the Sales Tax
field with the correct value.

BAPI for Creating a PM order(iw34) with reference to a Notification

Hi All,
Could anyone help to find the BAPI for creating a PM order with reference to a notification Number.
I will explain my requirement :
I want to create a notification from an external Application where i got the BAPI BAPI_ALM_NOTIF_CREATE and keeping this created notification number as Referece or for this notification number i need a create a PM order.Usually this process in done transaction IW34 in R/3.
But with the BAPI BAPI_ALM_ORDER_MAINTAIN i can create a PM order but this BAPI doesn't have a input parameter "Notification number ".So i can't use this BAPI.
Could any suggest for a BAPI where i can create a PM order with reference to a Notification Number.
Regards,
Sid

Hi,
I have tried with the FM CO_IH_ORDER_GENER_2 but when i executes it gives a error message
"<i>Service/maintenance order type PM02 not completely maintained in plant
Message no. IW216
Diagnosis
For the selected order type and plant, no check control is maintained in Plant Maintenance/Service in 'Availability Check for Materials, PRTs and Capacities'.
Procedure
A check control must be maintained for this combination of order type and plant</i>"".
And even have a doubt what to enter in this input parameter "GEWRK_OBJTYP" .
Kindly help me to solve this issue.
Regards,
Sid

Steps to create a purchase order in SAP r/3

Hi All,
    I need to create a purchase order in SAP R/3,I am very new to SAP R/3 just started using material managements module in R/3.Could any one please help me to know what all steps i need to take for creating a PO.Do i require some pre-requisite data in R/3?
Waiting for your reply!
Thanking you.
Regards,
Namrata.

Trigger
A purchase order needs to be created, and the vendor is known
Business Process Description Overview
A purchase order is a legal document issued by the buyer to the vendor to supply materials or service at the agreed price, terms and conditions. The Purchase Order forms the basis for all follow-on activities like Goods Receipt, Invoice Verification, etc. The Purchase Orders can be created directly by entering all the required data, copying already created purchase order, with reference to an RFQ/Contract or with reference to a PR.
Purchase Order creation is possible only if sufficient budget allocation is there for the Fund Centers. It is not possible to create Purchase Orders for a Vendor who is blocked for procurement or not maintained in source list for that item. Also it is not possible to create PO for Quantity more than the PR quantity.
All the price components which are to be paid to vendors and requires to be inventoried has to be included in PO.It is possible to add different vendors for delivery costs. The tax codes should be correctly maintained in PO for the purpose of Cenvat availment etc.
The payment term defaulted from Vendor Master or RFQ has to be verified and changed if required.
The incomplete Purchase Orders can be saved as HOLD document and later completed and saved thru Change PO menu
Input - Required Fields     Field Value/Comments
Vendor     Vendor number
Purchasing Organization     1000
Purchasing Group     Purchasing Group code
Date     Purchase order date
Account assignment category     Where costs will be allocated
Delivery Date     Anticipated Delivery Date
Plant     For which plant we are buying the material
Output - Results     Comments
Purchase order document     Can be changed, displayed or printed which can then be mailed to vendor
Tips and Tricks
The Purchase Orders can be created directly by entering all data required for creating PO or by copying another PO or with reference to RFQ/Contract/PR.To create a purchase order by copying existing document (PO/RFQ/PR), you can either select the desired document in the document overview   .and adopt it in the current purchase order in the right-hand area of the screen using the ADOPT button   .In addition you can drag it onto the shopping basket symbol   with the left-hand mouse button.
Click the Personal Settings button on the tool bar, this function is for default information for purchase order header data and also purchase order item data. This will reduce the amount of redundancy in the data entry, i.e. plant, company code.
One Purchase Order may be created for several purchase requisitions
Procedural Steps
1.1.     Access transaction by:
Via Menus     Logistics èMaterials ManagementèPurchasingèPurchase OrderèCreateèVendor/Supplying Plant Known.
Via Transaction Code     ME21N
1.2.     Double-click
On screen Create Purchase order
On screen select Domestic Purchase order in this screen . You can also select other document if you want to create other. Here drop down menu is available.
Click   to enter the organization data.
Screen will change in the header; enter data as given in the table below:
Field Name     R/O/C     Description
Purchasing Org.     R     Enter the purchasing organization code.
Example: 1000
Purch. Group     R     Enter the purchasing Group which is procuring the material
Example: P01
Company Code     R     Enter the company code under which above purchasing
Organization is.
Example: 1000
After entering the organization data enter the vendor or material supplier in the field    here drop down is available.click   to see the drop down.
Field Name     R/O/C     Description
Search term     O     Text that describes the vendor in more detail.
Example:     MICON
Vendor     O     Description of the vendor.
Example:     100008
Click   .
System displays all possible entries available as per data entered
Restrict value range (1)   1 Entries found
To select required Vendor Click   .
Click   .
Vendor selected
Now go to   ,here the system will pick up the data automatically from the vendor master but if you want to chane the data you can change the data. Here drop down menu is available.
Now go to   to mainatin the text.
After maintaining the text if you want to see or change the vendor address click   and do the amendments.
Now Go to   and click to enter the Items and other data as per the table given below:
Field Name     R/O/C     Description
Account Assignement     R     Key that identifies specific settlement receiver types such as cost centers, internal orders, work orders, asset accounts, or project WBS elements.Example: K
drop down menu is available here.
Item Cateogry     O     How the procurement of a material is controlled.
Drop down menu is available here.Example: Standard
Material     R     Here you will enter the material to be purchased from the
Vendor.
Here also drop down menu is available. Use the following
to select the material. Example ZROH-DEMO
In the figure above enter the search cretira for the material for example ZROH-DEMO and click
. The follwing result will appear on the screen select the line item and click   to select
the material.
Short Text     R     Enter here short description about the material,if the text is not
automatically picked up from the material master.
PO Quantity     R     Enter here quantity to be ordered.
Example 10
Order unit     R     Here we enter the order units of measurement.
Here also drop down menu is available.
Example : KG
Category of delivery date     O     Here you can enter deleviery date format.
Here also drop down menu is available.
Example : Day format
Delivery date     R     Enter the delivery date. You can use the calender provided by
the system.
Example : 28.02.2006
Net price     R     Enter the net price of the material here
Example : 1000 INR
Material group     R     Enter the material group to which that material belongs.Here
also drop down menu is available. This field is also automatic
picked up field.
Example : M10001
Plant     R     Enter the plant code for which you are purchasing the material
Here also drop down menu is available.
Example : 1100
Storage location     O     Here you will enter where the material is to be stored. Drop
Down menu is available here.
Example WH01
Click Enter and system will give you message
You will now see the screen
Field Name     R/O/C     Description
Cost Centre     R     The purchase is done for which purpose. Here also drop down
Menu is available.
Example: 11050 for CDU/VDU /SGU OP
G/L Account     R     G/L account from which payment will be done.
It will be automatically be picked up from the material group
You can change it also.
Unloading Point     O     Specifies the point at which the material is to be unloaded.
Recipient     O     Specifies the recipient for whom the material is destined.
Click   to see and to change the Tax Code at item level.
Select    to view the taxes applied on the line item.
click   to go back to the previous screen .
On the main screen in the same tab if you want to change the taxe select the tax code from the drop down available
After selection again, Select    to view the taxes applied on the line item.
If you want to add more conditions click   tab and enter the conditions from the drop down
You can also maintain the text at item level by clicking   tab.
After completeing this all click   to check wether here is any error in the purchase order , If there will not
                         ↓
any error then on the screen following line will appear.
If there will be some error the system will throw the message on the screen
select the line item and click   to see the detail of the error.
close this window now and goto main screen to rectify the error.
After rectifying the error again click   to check wether here is any error in the purchase order.
Now click   to save the purchase order, after clicking the button the following message will appear

Need a Bapi to Create a purchase order

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