Automation Script to throw warning message for issuing items against asset under warranty:

from java.util import Calendar
from psdi.server import MXServer
from psdi.util import MXApplicationException
if mbo.getOwner().getString('WARRANTYEXPDATE') =='':
 errorgroup = ""  
 errorkey = ""
else:
 if(mbo.getOwner().getDate('warrantyexpdate') >= (Calendar.getInstance().getTime())):
  msgparams = [mbo.getOwner().getString('ASSETNUM')];
  mxae = MXApplicationException("workorder","AssetWarrantyNotice",msgparams)
  mbo.getThisMboSet().addWarning(mxae)