Item category grey out and cannot change

Question

I created an item category ZTAC with Structure scope= D.  During sales order entry, the item category is grey out and cannot be changed.
Is there a way or any config to allow changes?
Regards
PSK

Answer 1

You can check the changebility of the item category in program         
MV45AFFE_FELDAUSWAHL_STATUS. SAP Note 208245 helps explain the logic.                                                                               
In Form FELDAUSWAHL_VBAP-MATNR_SPEZ you encounter the following piece 
of code that sets CH_SUBRC to 1, because of field TVAP-STRUM:                                                                               
4 SAPMV45A FORM FELDAUSWAHL_VBAP-MATNR_SPEZ                          
  3 SAPMV45A FORM FELDAUSWAHL_VBAP-MATNR                               
  2 SAPMV45A FORM FELDAUSWAHL_STATUS                                   
  1 SAPMV45A MODULE (PBO) FELDAUSWAH                                   
     XVBAPF-VMENGE > 0    OR                                           
     XVBUP-FKSTA CA 'BC'  OR                                           
     VBAP-PROSA  EQ CHARC OR                                           
     TVAP-STRUM  CN 'E '  OR              <<<<< Here                   
start Revenue Recognition Project                                      
no more changes after revenue is recognized                            
     XVBUP-RRSTA CA 'BC' OR                                            
end Revenue Recognition Project                                        
     VBAP-ANZSN > 0      OR                                            
     VBAP-VKGRU = VKGRU_DYN_POSTEN OR                                  
     VBAP-VKGRU = VKGRU_DYN_POSTEN_AG OR                               
     ( VBAP-KZVBR NE SPACE AND NOT                                     
     ( VBAP-KZVBR EQ KZVBR_P AND VBAP-PS_PSP_PNR IS INITIAL ) AND      
     XVBUP-UPDKZ NE UPDKZ_NEW ) OR                                     
     ( not VBAP-KALNR is initial  AND                                  
     XVBUP-UPDKZ NE UPDKZ_NEW ).                                       
    CH_SUBRC = 1.                         <<<<< Here                   
    EXIT.                                                              
Because TVAP-STRUM is equal to 'D' and CH_SUBRC = 1 is causing         
SCREEN-INPUT = 0 (not changeable) in the following piece of code:                                                                               
2 SAPMV45A FORM FELDAUSWAHL_STATUS                                   
  1 SAPMV45A MODULE (PBO) FELDAUSWAHL                                                                               
Main Program     SAPMV45A                                              
Source code of   MV45AFFE_FELDAUSWAHL_STATUS                           
    when 'MATNR'.                                                      
      perform feldauswahl_vbap-matnr changing sy-subrc.                
      if sy-subrc > 0.                                                 
        screen-input = 0.                  <<<< Here                   
      endif.                                                           
You may use USEREXIT_FIELD_MODIFICATION in MV45AFZZ to open this field 
if needed. If you set  SCREEN-INPUT to 1 when SCREEN-NAME = 'VBAP-PSTYV',
etc you will be able to enter the item category.                                       
I hope this helps.
Gerard
Edited by: Gerard Magorrian on Oct 15, 2010 10:07 PM