MSP430F5438A: Erratic behavior of Write/Read functions when using TI USCI in I2C mode. UCB2.

Source code and oscilloscope traces would be helpful.

This is the Write function:

void WriteEepromBlock2(unsigned int address, unsigned char* data, unsigned int numBytes)
{
unsigned char* dPtr = data ;
unsigned char addressH = 0x00; // making local
unsigned char addressL = 0x00; // making local
int i = 0; // loop counter
int j = 0; // loop counter

// uint calculatedCsum = 0;
// uchar calculatedCsumL = 0;
// uchar calculatedCsumH = 0;

// ==========================================================================================
// ================== Send bytes to eeprom ===============================================
// ================== ensure slave address points to block 2 ===============================

if (UCB2I2CSA != 0x54) // if not block2
{
InitializeUcb2Block2();
} // end if not block 2

// DelayMs(idelayTimeTiEepromI2c); // Works without this one

//================= Clear bytesToSend =======================

for (i=0; i<bytesToSendSize; i++)
{
bytesToSend[i] = eraseChar;
} // end for i

// =================== load target eeprom address ======================================
i = 0; // reset loop counter

addressL = (address & 0xFF);
addressH = (address >> 8);

//================= load address and data into bytesToSend ==========================
bytesToSend[0] = addressH;
i++;
bytesToSend[1] = addressL;
i++;

for (j=0; j< numBytes; j++) // for each byte
{
bytesToSend[i] = *dPtr;
i++;
dPtr++;
} // end for j

PTxData = (unsigned char*)bytesToSend; // set pointer for isr
TXByteCtr = i; // 2 byte address,

// =============== disable write protect and give control to isr =======================

WPLO; // breakpoint HERE for bytesToSend...
// DelayMs(5); // Works without this one

TESTHI;

UCB2CTL1 |= UCTR + UCTXSTT;

while(UCB2CTL1 & UCTXSTP); // spin until UCTXSTP bit == 1 (until all bytes have been sent)

TESTLO;

DelayMs(1); // Needs this one and needs it before WPHI

WPHI; // enable write protect


} // end function void WriteEepromBlock2(unsigned int address, unsigned char* data, numBytes)

//===================================================================================================
//===================================================================================================

This is the function call that works in file lcd.c:
WriteEepromBlock2(ALBLEVELNV, (unsigned char*) &fcd_FlowCalibrationData.d_AlarmBLevel, FLOAT_SIZE);

This is the function call in file HARTCMDS.C that doesn't work:
WriteEepromBlock2( ALBCHOICENV, (uchar*)&tempFloat, FLOAT_SIZE );

I have logic analyzer (like scope) patterns of success and failures. How do I attach them to this thread??