Hello Damola,
KB article 844270 describes how to use TI and change the currency of the batch. I have copied the steps below.
Specify the Currency ID, Rate Type, and Effective Date in the Transaction Import (98.500.00) Data file.
1. Currency and CuryRate lines may be added to a Transaction Import Data File. The following rules must be observed:
>> Only one currency per batch may be imported, while the Rate and Rate Type may change throughout the batch. Therefore, if entering a Currency line in a Data file it must be followed by a CuryRate line followed by a Batch line. However, a CuryRate line can be placed by itself in a Data file.
>> The currency cannot change while entering detail lines. Therefore, a Currency or CuryRate line cannot be placed between detail lines (i.e. Detail,"","" CuryRate,SPOT,"",1.2 Detail,"","").
>> In order to use a CuryRate line, at least one Currency line must have been successfully processed.
>> A Currency ID on a Currency line cannot be left to defaults (i.e. ""). The Effective Date and the Rate on the CuryRate line can be left to default.
>> Following is an example of a correct Voucher Data file entry:
Currency, CAD
CuryRate, SPOT, 03/03/2003, .74
"Batch",,200501,"H",100.00,
"Document",,"VO","VENDID",03/03/2003,,03/03/2003,01,100.00,0,"A",,,,,03/03/2003,,,,,,,,,,,,,,,,,,,,,,,,
"Transaction","N",5200,,,0000,,,,,100.00,,,,,,,,,,,,,,,,,,,,,
(where CAD = the correct currency and VendID = the correct Vendor ID etc...)
2. No change to the Transaction Import Control File is required.
I hope this helps.