ippiConv memory access problem

Hi, 

I am trying for a very long time to convert code to work with non-deprecated IPP function (a Long-term hobby for this forum participants). I am having difficulties converting the old ippiConvValid_16s_C3R commands to the new ippiConv_16s_C3R it ofter crash with "Unhandeld exception: Access violation reading location 0xffffffff".

I am using Visual Strudio 2013, the code compiles with Intel Parallel Studio XE 2015 Update 4 Composer edition for C++ Windows Version 15.0.1386.12.XE, Compilation of 32 bit, with support for SSE 4.1/4.2. The code rum on Windows 7 32 bit based on i5 M520 cpu (and crashes also on Windows 8.1 64 bit with an i7 4790 processor). IPP version: 8.2.2 (r46212); ippIP SSE4.1/4.2 (p8)+; from 1 Apr 2015.

<pre brusk:cpp>
void CUnitTestsDlg::OnBnClickedConvolutionTestButton ()
{	// 15.2.16
	const IppLibraryVersion *pVer = ippiGetLibVersion ();
	BeginWaitCursor ();
	for (int i=0; i<1000; i++) {
		const int sourceWidth  = 1280;
		const int sourceHeight =  960;
		const int sourceChannels = 3;
		const int sourceDepthBits = 16 * sourceChannels;

		IppiSize imageSize;
		imageSize.width  = sourceWidth;
		imageSize.height = sourceHeight;
		int depthBytes   = sourceDepthBits / 8;
		int imageStep    = sourceWidth * depthBytes;

		IppiSize matrixSize;
		matrixSize.width  = 3;
		matrixSize.height = 3;
		int matrix1Step = matrixSize.width * depthBytes;

		std::unique_ptr <signed short> pSourceImage = std::unique_ptr <signed short> (new short[sourceWidth * sourceHeight * sourceChannels]);
		std::unique_ptr <signed short> pDestImage   = std::unique_ptr <signed short> (new short[sourceWidth * sourceHeight * sourceChannels]);

		// fill reasonable data
		short convMatrix[3][3][3];
		convMatrix[0][0][0] = convMatrix[0][0][1] = convMatrix[0][0][2] = -1;
		convMatrix[0][1][0] = convMatrix[0][1][1] = convMatrix[0][1][2] = -2;
		convMatrix[0][2][0] = convMatrix[0][2][1] = convMatrix[0][2][2] = -1;
		convMatrix[1][0][0] = convMatrix[1][0][1] = convMatrix[1][0][2] = -2;
		convMatrix[1][1][0] = convMatrix[1][1][1] = convMatrix[1][1][2] = 13;
		convMatrix[1][2][0] = convMatrix[1][2][1] = convMatrix[1][2][2] = -2;
		convMatrix[2][0][0] = convMatrix[2][0][1] = convMatrix[2][0][2] = -1;
		convMatrix[2][1][0] = convMatrix[2][1][1] = convMatrix[2][1][2] = -2;
		convMatrix[2][2][0] = convMatrix[2][2][1] = convMatrix[2][2][2] = -1;
		for (int y = 0; y < sourceHeight; y++) {
			for (int x = 0; x < sourceWidth; x++) {
				int index = y*imageStep/2 + x * 3;
				pSourceImage.get ()[index    ] = x % 256;
				pSourceImage.get ()[index + 1] = y % 256;
				pSourceImage.get ()[index + 2] = (x + y) % 256;
			}
		}

		// old commands - always works
		IppStatus retIppiStatus = ippiConvValid_16s_C3R (
			pSourceImage.get (),  imageStep,   imageSize,		// original image: source
			&convMatrix[0][0][0], matrix1Step, matrixSize,		// convolution matrix
			pDestImage.get (),    imageStep,					// result image buffer: destination
			1													// convolution divider
		);

		// new commands: Often crashes
		std::unique_ptr <unsigned char> pAssistConvolution {nullptr};
		int buffSizeValid = 0;
		IppEnum algType = (IppEnum)(ippAlgAuto | ippiROIValid | ippiNormNone);
//		IppEnum algType = (IppEnum)(ippAlgAuto | ippiROIFull | ippiNormNone);
		ippiConvGetBufferSize (imageSize, matrixSize, ipp16s, sourceChannels, algType, &buffSizeValid);
		pAssistConvolution = std::unique_ptr <unsigned char> (new unsigned char [buffSizeValid]);

		retIppiStatus = ippiConv_16s_C3R (
			pSourceImage.get (),  imageStep,   imageSize,		// original image: source
			&convMatrix[0][0][0], matrix1Step, matrixSize,		// convolution matrix
			pDestImage.get (),    imageStep,					// result image buffer: destination
			1,													// matrix divisor paramaeter
			algType,											// convolution type
			pAssistConvolution.get()							// assitance buffer
		);
	}
	EndWaitCursor ();
}

<\pre>