Mitsubishi Electric MELSEC-Q00U(J)CPU User Manual page 410

(2) Precautions for using the local pointer
(a) Program where the local pointer is described
A jump from another program is not allowed.
Use the ECALL instruction from another program when calling a subroutine program in a program file that
contains any local pointer.
(b) Total number of local pointer points
If the total number of pointers (in all programs) exceeds the number of points available for each CPU module, a
"Pointer configuration error" (error code: 4020) occurs. For the number of available pointer points of each CPU
module, refer to Page 406, Section 4.10 (3).
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