Hello Zopers! I'm currently writing a script that adds some ExtFiles and then execute an external method. Here's the script [Script1]: context.data['0002']['folder1'].manage_addProduct['ExtFile'].manage_addE xtFile(id='1', title='file1', file=file1) context.data['0002']['folder1'].manage_addProduct['ExtFile'].manage_addE xtFile(id='2', title='file2', file=file2) context.data['0002']['folder1'].manage_addProduct['ExtFile'].manage_addE xtFile(id='3', title='file3', file=file3) context.runExternalMethod(params) return 'OK' When the external method causes NO errors, the Extfiles are made. But when the Extrenal method causes an error, zope shows up the standard_error_message and the ExtFiles are not made..... I then executed the script from another script [Script2]: try: context.Script1() except: return 'ERROR' else: return 'OK!' When Script1 causes an error (from the extrernal method) the extfiles are made. Zope shows 'ERROR'. Why does this happen. When I execute Script1 from Script2 without try-except the extfiles are not made when the script causes an error... What must i add to undo all actions made in Script1? Thanks for the support! Marco.