Thread: Another 'dereferencing pointer to incomplete type'

Essence of the code regarding issue:

Code:

typedef struct BMS_Chkmem{
  int elemsize;
} BMS_CHKMEM;  

typedef struct BMS_Blkmem{
  BMS_CHKMEM* chkmemhash[1013];
} BMS_BLKMEM;

typedef struct SCIP_Mem{
  BMS_BLKMEM* setmem;
} SCIP_MEM;

void* allocMemory(size)
{
  void* ptr;
  ptr = malloc(size)
  return ptr;
}

BMS_BLKMEM* createBlockMemory(void)
{
  int i;
  BMS_BLKMEM* blkmem;
  blkmem = allocMemory(sizeof(*(blkmem)));

  for (i=0; i < 1013; i++)
  {
    blkmem->chkmemhash[i] = NULL;
  }

  return blkmem;
}

void memCreate(SCIP_MEM** mem)
{
  mem = allocMemory(sizeof(**(mem)));

  (*mem)->setmem = createBlockMemory();

  if ( (*mem)->setmem->chkmemhash[60] == NULL)
    printf("Is null\n");
  else
    printf("Is not null\n");
}

int main(void)
{
  SCIP_MEM* mem;
  memCreate(&mem);
  return 0;
}

The above code is simple the essence of what I'm using, I'm not even sure if it would compile, but I hope it contains everything needed.

memCreate is called, and is passed a pointer of a higher struct, which at the time is NULL, the idea being to allocate it some memory, and initialize it. When I try to compile the code that this is taken from, I get an error of:

dereferening pointer to incomplete type

This error relates to:

if ( (*mem)->setmem->chkmemhash[60] == NULL)

From what I can see, this should work, but clearly I'm overlooking something.