Misra rule 20.3

[dvnarendra]

Code:

#define MAX_BUF_LEN 20
#define MAX_ID_LEN    40

typedef struct
{
uint8_t  sno[MAX_BUF_LEN];
uint8_t  ID[MAX_ID_LEN ];'
} xdata_t;

typedef {
uint8_t   time;
uint32_t vol;
uint8_t ID[MAX_ID_LEN ];
}xpf_t

xdata_t  testdata;
xpf_t      pfdata
....
memcpy(pfdata.ID, testdata.ID, MAX_ID_LEN );  // Misra not compliant
......

I am using parasoft tool for checking misra compliance. for the above memcpy line I am getting the following misra non compliance

Values is "ID" passed to library function "memcpy" without being checked

I am using statically declared array. Why is it throwing this misra compliance? Can any one point how to make thsi line compliant

TIA
Narendra