我有定义solid_section，为什么计算的时候还会出现 SECTION 2 is not found

*** Error 10157 (KEY+157)
SECTION 2 is not found
*** Error 10157 (KEY+157)
SECTION 3 is not found
*** Error 10157 (KEY+157)
SECTION 4 is not found
*** Error 10157 (KEY+157)
SECTION 5 is not found
*** Error 10125 (KEY+125)
Checking PART and SECTION definition input.
PART ID 1 with
SECTION ID 2 does not exist.
This is PART 1 in the order of input.
*** Error 10125 (KEY+125)
Checking PART and SECTION definition input.
PART ID 2 with
SECTION ID 3 does not exist.
This is PART 2 in the order of input.
*** Error 10125 (KEY+125)
Checking PART and SECTION definition input.
PART ID 3 with
SECTION ID 4 does not exist.
This is PART 3 in the order of input.
*** Error 10125 (KEY+125)
Checking PART and SECTION definition input.
PART ID 6 with
SECTION ID 5 does not exist.
This is PART 6 in the order of input.