IPC:bute in the field catalogue while processing configuration or pricing i

Question

Hi,
I get this error (Message Class: PRC_MESSAGES_EXT (Messages for Calling Public Pricing Modules), Message Type: E, Message Number 099, Message variables: Message variables 1-4: IPC:bute in the field catalogue while processing configuration or pricing in context spe.condmgnt.customizing.dba.imp.AttributeClassObjectManager.createAttributeClassAttributeClassObjectManager.java)
when we ran IPC userexits. 
We've added a field ZZPSTYV in the communication structure and modified the method to define this field like follows:
     public String[] determineRelevantAttributesForRequirement(
          boolean headerAttributes,
          int reqNo) {                         String[] relevantAttributes = new String[0];
     //Header?
     if (headerAttributes) {          }
     //Item
     else {
     //KOMP fields
     switch (reqNo){
          case 900:                              relevantAttributes = new String[] {"ZZPSTYV" };                                   break;
    return relevantAttributes;
Running this code we get the above listed error.  Same error if we define unnecessarily a standard field, such as SOLD_TO_PARTY in place of ZZPSTYV.  
Can anyone give us some advise as what we did wrong?  Appreciate it very much,
Yanhui

Answer 1

Hi Yanhui,
Is it a item field?  Remember that mixed fields should be declared at the header in the IPC.
Missing any other requirements?
Cheers
Andrew