Hi Hitesh, thanks. And i have the same problem in line 303 with: tatus = ps2000aSetChannel(unit->handle, (PS2000A_CHANNEL) PS2000A_CHANNEL_A + i, unit->channelSettings[PS2000A_CHANNEL_A + i].enabled, (PS2000A_COUPLING) unit->channelSettings[PS2000A_CHANNEL_A + i].DCcoupled, (PS2000A_RANGE) unit->cha...