Hi Satish
As you said 4 fields values are missing out of 34. Are those fields values are coming as blank in the file or not at all coming.
Ex:
you have 4 fields a,b,e,g and in channels you have defined length as 2,4,6,7
If values for fields a,b,e,g are coming as 1,22,33,44444 respectively then the flat file is generated as
1-22--33----4444--- (Consider - as space here)
Now if you say e and g value then is the flat file generated as
1-22---------------
or
1-22--
Regards
Osman