请问：我用z-tool读取nv 经常有数据读不到，有时候能读到？

<RX>04:29:07.76 COM9 SYS_OSAL_NV_READ_SRSP (0x6108)
Status: INVALID_PARAMETER (0x2)
Len: 0x00
Value:

<TX>04:29:20.1 COM9 SYS_OSAL_NV_READ_EXT (0x211C)
Id: 0x0101
Offset: 0x0000

<RX>04:29:20.13 COM9 SYS_OSAL_NV_READ_EXT_SRSP (0x611C)
Status: INVALID_PARAMETER (0x2)
Len: 0x00
Value:

<TX>04:30:31.7 COM9 SYS_OSAL_NV_READ (0x2108)
Id: 0x0002
Offset: 0x00

<RX>04:30:31.73 COM9 SYS_OSAL_NV_READ_SRSP (0x6108)
Status: SUCCESS (0x0)
Len: 0x02
Value: .. (0x05, 0x00)