Lost printf() output using ULink2

I've got code in my project to dump out a data buffer using printf.  STDOUT is redirected to the ULink2/uVision "Debug (printf) viewer".

It should produce output like this:

00000000:  00020400 00000000 5C0C0000 5C0C0000  ........\...\...
00000010:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000020:  5C0C0000 5C0C0000 C2030000 5C0C0000  \...\.......\...
00000030:  5C0C0000 B4050000 5C0C0000 5C0C0000  \.......\...\...
00000040:  5C0C0000 F4050000 5C0C0000 5C0C0000  \.......\...\...
00000050:  20060000 5C0C0000 5C0C0000 5C0C0000   ...\...\...\...
00000060:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000070:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000080:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000090:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000A0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000B0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000C0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000D0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000E0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
000000F0:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...

but what I get in the debug viewer is this:

0000 5C0C0000  \...\...\...\...
00000050:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000060:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000070:  5C0C0000 5C0C0000 5C0C0000 5C0C0000  \...\...\...\...
00000080:  5C0C0000 C8020000 5C0C0000 5C0C0000  \.......\...\...
FFFFF00  ................

I suspect some form of overrun is occurring.  If I step through the code I get all the output as I expect.

Code:

void dumpHex(const void* DataPointer, size_t DataLength)
{
	if (NULL != DataPointer)
	{
		char             StringBuffer[100] = { '\0' };
		const unsigned char* p = (const unsigned char*)DataPointer;
		unsigned char* pd;
		unsigned char* pa;
		size_t           PointerSize = sizeof(void*);
		size_t           DataOffset = (PointerSize * 2) + 2;
		size_t           AsciiOffset = DataOffset + 38;
		size_t           LineLength = AsciiOffset + 16;
		size_t           index, i;
		int              n;


		index = 0;
		while (index < DataLength)
		{
			pd = (unsigned char*)StringBuffer + DataOffset;
			pa = (unsigned char*)StringBuffer + AsciiOffset;

			memset(StringBuffer, ' ', LineLength);
			n = snprintf(StringBuffer, sizeof(StringBuffer), "%p", (void*)(index));	
			StringBuffer[n] = ':';

			for (i = 0; (i < 16) && (index < DataLength); i++)
			{
				if ((i % 4) == 0) pd++;

				*pd++ = HEX[*p / 16];
				*pd++ = HEX[*p % 16];
				*pa++ = (' ' == *p || isgraph(*p)) ? *p : '.';

				index++;
				p++;
			}

			printf("%s\n", StringBuffer);
		}
	}
}

What do I need to do to ensure I get all the output?

Thank you, David