It looks like an error but maybe not

[tester_V]

Sure.
I'm trying to pull out two lines after a matched line, I'm splitting both lines and will extract elements from each line and print it it to a different file.
I have no errors after the first:
ln_f = next (each_dirf)
but after the second:
ln_f = next (each_dirf)
errors starts.

Here is a bloc I have the problem with.
I have next two bloks like this one and both producing the same error. rest of the "IF" blocks having NO problems.

                    if 'type="HDDD' in ln_f :                                                            
                        ln_f = next (each_dirf)
                        
                        ln_f = ln_f.lstrip()
                        ln_f = ln_f.replace("=", " ").replace('"','')
                        mm11 = ln_f.split(" ")                         
                        w1 = slot_number+","+mm11[8]+","+mm11[10]+","+mm11[12]+","+mm11[14]+","+mm11[18]+" "+mm11[19]
                        
                        XML_Lines_Out.write(w+w1+'\n')

                        ln_f = next (each_dirf)                                         
                        ln_f = ln_f.lstrip()
                        print (">>>>> ", ln_f)