[C++]메모리 동적 할당에 관해서 해제를 하면 자꾸 오류가 뜹니다

#include <use_opencv.h>
 
#include <iostream>
#include <fstream>
#include <string.h>
void main()
{
	int nWidth = 176;
	int nHeight = 144;
	int nImgSize=nWidth*nHeight;
	int nSet = 19;
 
	unsigned short *pnZ = new unsigned short [nImgSize];
	char *szFileNamePlsNumber = new char [];
 
	FILE *fin;
 
 
	CvSize cvImgSize = cvSize(nWidth, nHeight); // SR image size
	IplImage *cv_DistImg_16U = cvCreateImage(cvImgSize,IPL_DEPTH_16U,1);
	IplImage *cv_DistImg_8U = cvCreateImage(cvImgSize,IPL_DEPTH_8U,1);
 
	for(int i=0; i<nSet; i++)
	{
		sprintf(szFileNamePlsNumber, ".\\data1\\3DPCL_Z_Vec_U_%d.txt", (i+1));
		fin = fopen(szFileNamePlsNumber, "r");
		if(fin==0){printf("%d 의 데이터 로드 실패! \n", i+1);}
		else
		{		
			for(int j=0; j<nImgSize; j++)
			{				
				fscanf(fin, "%d", &pnZ[i]);		
 
 
			}
 
			memcpy(cv_DistImg_16U->imageData, pnZ, cvImgSize.width*cvImgSize.height*sizeof(unsigned short));
			cvConvertScale(cv_DistImg_16U, cv_DistImg_8U, 255./2000., 0);
 
 
 
		}
	}
	fclose(fin);	
	delete [] pnZ;
	//delete [] szFileNamePlsNumber;	
	cvReleaseImage(&cv_DistImg_16U);
	cvReleaseImage(&cv_DistImg_8U);
}