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Problem "EDMAK Error: dma_ioctl: REQUESTDMA failed: -22 " with updating IPNC2.5 to IPNC2.6

Hi,everyone . When I update IPNC2.5 to IPNC2.6,I enconter the following problem.

The av_server cannot run normally. When I run it manualy,the following appears:

./av_server.out DM368 PAL WIN TI2A AEWB D1 H264 3000000 VBR AUTO H264 384000 VBR AUTO MENUOFF &

EDMAK Error: dma_ioctl: REQUESTDMA failed: -22

Alignment trap: av_server.out (568) PC=0x000636b8 Instr=0xe5933004 Address=0x00000199 FSR 0x001

Who can tell me why? Thank you !