Error in DAQThe requested memory could not be allocated Status Code:-50352

[Molugu]

I Created two tasks for channel 0-11 for writing Data, and from 12-19 for Reading Data.

Here is the posrtion of the code:--

static TaskHandle  InputTaskHandle = 0;

 uInt16 readArray[1000];

 chkDaqErr(DAQmxCreateTask ("DaqmxInputTask ", &InputTaskHandle));
 chkDaqErr(DAQmxCreateDIChan (InputTaskHandle, "Dev1/line12:19", "", DAQmx_Val_ChanForAllLines));
 chkDaqErr(DAQmxCfgSampClkTiming (InputTaskHandle, NULL, sampleRate,DAQmx_Val_Rising, DAQmx_Val_ContSamps, (uInt64)1E9));

 chkDaqErr(DAQmxReadDigitalU16 (InputTaskHandle,numSamples, 1.0, DAQmx_Val_GroupByChannel ,
  readArray, 1000, &sampsPerChanRead, 0));
I am getting the error at this point ->DAQmxReadDigitalU16

Errorr is

Error in DAQ writing format to NI-6537->The requested memory could not be allocated.
Task Name: DaqmxInputTask

Status Code: -50352

I am attaching the code also.

Please can you tell me where its going wrong?

[Brad_K]

Hi Molugu,

In continuous mode, the sampsPerChanToAcquire parameter of DAQmxCfgSampClkTiming is used to determine the buffer size. You are specifying 1e9 samples. If each sample is 4 bytes, that requires a 4e9 byte buffer, which is about 3.7 GB. If each sample is 2 bytes, it's still a pretty large buffer, and I don't know how much RAM you have in your PC. Try reducing sampsPerChanToAcquire.

Brad