Uplod Units

What is upload units? for example,if you have a CSV file, which contains 25 records. In Web config you set 10 records as a maximum, CsvToWebRec will do 2 times 10 records uploads、and 1 5 record upload. So, each communication appears CSV record upload Sending records Sending record counts 1st. from record[0] to record[9]. 10 recods. 2nd. from record[10] to record[19]. 10 recods. 3rd. from record[20] to record[24]. 5 recods. like above.   In this moment, each properties values are, %RECINDEX% %RECCOUNT% record[0] 0 record[1] 1 record[2] 2 record[3] 3 record[4] 4 record[5] 5 record[6] 6 record[7] 7 record[8] 8 record[9] 9 10 record[10] 0 record[11] 1 record[12] 2 record[13] 3 record[14] 4 record[15] 5 record[16] 6 record[17] 7 record[18] 8 record[19] 9 10 record[20] 0 record[21] 1 record[22] 2 record[23] 3 record[24] 4 5 like above.