We need to retrieve attribute information using standard lookup, but there are errors occurring during the retrieval process. 

Code:

import oracle.apps.scm.doo.common.extensions.ValidationException;

TransactionTypeCode = header.getAttribute("TransactionTypeCode");

BuyingPartyNumber = header.getAttribute("BuyingPartyNumber");

def lines = header.getAttribute("Lines");                               

while( lines.hasNext() ) {                                       

 def line = lines.next();                                       

 def itemNumber = line.getAttribute("ProductNumber");

 } 

def rules = getStandardLookupDetails("XXXXX_PRETRANSFORMATION_RULES");

while (rules.hasNext()) {

def rules_row = rules.next();

    throw new ValidationException("Unable to fetch Item Types from Lookup " + rules_row.getAttribute("AttributeChar1"));

}

Object getStandardLookupDetails(String lookupType) {

  def lookupPVO = context.getViewObject("oracle.apps.fnd.applcore.lookups.model.publicView.LookupPVO");

def vc = lookupPVO.createViewCriteria();

def vcrow = vc.createViewCriteriaRow();

vcrow.setAttribute("LookupType", lookupType);

vc.add(vcrow);

def rowset = lookupPVO.findByViewCriteria(vc, -1);

if (!rowset.hasNext()) {

throw new ValidationException("Unable to fetch Item Types from Lookup " + lookupType);

  }

return rowset;

}