[amibroker] HMDS query returns no historidcal data ?

["itmwh" <toxutao@xxxxxxxx>]

Hi, I have bought a second computer and try to set up AB and IB TWS on 
this new computer.  This morning 9am I find that I am not able to 
backfill historical datas from TWS. Amibroker can only shows the market 
data after the program is initialized, but when I tried to backfill 
sgxnk,  it feedbacks:

NKH08-SGX-FUT,Historical market service error message: HMDS query 
returned no data: NKH08@xxx trades  . But at the same time, my old 
computer backfilled the same symbol correctly. (NKH08, or March contract 
of SGXNK started trading at 7:45am )



Who can tell me what is the reason for this ? 



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