I am trying to read file with 30 rows and 5 columns with separator of "tab". Each time I get only part of the rows. In the windows environment it's working good. Any idea why in unix it is not working? while (fscanf(FFMapFile,"%s\t%s\t%s\t%s\t%s\t",fnfMap[i].COS_ID,fnfMap[i].FF_First_Act,fnfMap[i].FF_Next_Act,fnfMap[i].Free_FF_allowed,fnfMap[i].FF_Change_Charge)!=EOF) { sprintf(s,"%s\t%s\t%s\t%s\t%s\t",fnfMap[i].COS_ID,fnfMap[i].FF_First_Act,fnfMap[i].FF_Next_Act,fnfMap[i].Free_FF_allowed,fnfMap[i].FF_Change_Charge); error_log(s,ERROR); i++; }