Your results correct how? 
exchangeB_groupA.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 NDB 10 10 RFD 10 10 ZFF 10 10
exchangeC_groupA.gateway_risk=A 10 10 AA 10 10 ABC 10 10 EFF 10 10 MMM
+ 10 10 NDB 10 10 RFD 10 10 ZFF 10 10 ZZD 10 10

[download]
from your examples:
exchangeB_groupA contains:
A AA ABC EFF ZFF
and exchangeC_groupA:
AA ABC EFF ZFF ZZD
but your results say: 
A    exchangeB_groupA(ln4)    not found
A    exchangeC_groupA(ln7)    not found
ADF    exchangeB_groupA(ln4)    not found
ADF    exchangeC_groupA(ln7)    not found
BFD    exchangeB_groupA(ln4)    not found
BFD    exchangeC_groupA(ln7)    not found
ZZD    exchangeB_groupA(ln4)    not found

[download]
A for exchangeB_groupA is not found?
The symbol A is in exchangeB_groupA and he should be found.

In reply to Re: same script, different results by Lennotoecom
in thread same script, different results by jb60606

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