Invalid acount code in J.E

i want to import G/L balances through DTW file of journel entry .

i have prepared file of JDT1 - JournalEntries_Lines. & OJDT - JournalEntriesried

getting invalid acount code. when i have tired small file with few line item in J.E . file is imported sucessfully.

but unable to import date with fie containing 1000 line item

what is the reason of invalid account code .