New to SPI - SRAM interfacing with PIC18 in Proteus

[Synaps3]

I'm trying to interface an SPI SRAM chip with a PIC18F4685 in Proteus. The data appears to be sent if I look at the SPI debugger, but right after that there is a receive with ?? and Proteus returns "Unrecognized command code [00]". Right now I'm only trying to write. I will later implement the read.

I've attached an image of the SPI debugger. You can see in the debugger command = 2, address = 0x0a01, and data = 0xBB. This is correct, but what is this error after?

My code in mikroC:

// SerialRAM connections
sbit Chip_Select at RC7_bit;
sbit HOLD at RC6_bit;
sbit Chip_Select_Direction at TRISC7_bit;
sbit HOLD_Direction at TRISC6_bit;
// End SerialRAM connections

unsigned int i;
unsigned short tmp;

// Write one byte of data to specified address
void Write_Data(unsigned int address, unsigned short dat){
  Chip_Select = 0;                       // Select SerialRAM
  SPI1_Write(2);                         // Write instruction
  SPI1_Write(address >> 8);              // Sending 16 bits address
  SPI1_Write(address);
  SPI1_Write(dat);                       // Writing one byte of data
  Chip_Select = 1;                       // Deselect SerialRAM
 }

// Read one byte of data from specified address
unsigned short Read_Data(unsigned int address){
  Chip_Select = 0;                       // Select Serial RAM
  SPI1_Write(3);                         // Read instruction
  SPI1_Write(address >> 8);              // Sending 16 bits address
  SPI1_Write(address);
  tmp = SPI1_Read(0);                    // Read one byte of data
  Chip_Select = 1;                       // Deselect SerialRAM
  return tmp;
}

void InitRAM() {
  Chip_Select_Direction = 0;             // Set CS# pin as Output
  Chip_Select = 1;                       // Deselect SerialRAM
  SPI1_Init();                           // Initialize SPI module

  HOLD_Direction = 0;                    // Set HOLD# pin as output
  HOLD = 1;
}                              // Hold high when this function is not used

void TestRAM()
{
  InitRAM();
  Write_Data(1 + 0x0A00, 0xBB);
}

(TestRAM is called from main elsewhere)