Program control not coming out of DMA ISR

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Hi,
I am using four VADC channels from two groups(two from each group) and two GPDMA channels to transfer the result to memory. The VADCs are in auto triggering mode..
I can see that the micro controller is busy full time in the DMA ISR itself..The control is not even coming to main.c while loop..Can anybody tell me what is the problem?
I am hereby attaching my VADC configuration and GPDMA configuration..
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Hi,
I am sorry..i forgot to mention the controlled details..I am using XMC4500 RelaxLite kit..

Thanks in advance..
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