Cause:
Subprogram nesting exceeds 8 levels.
Troubleshooting:
Check whether subprogram nesting exceeds 8 levels.
Solution:
Modify the program to make the number of nesting levels smaller, within 8 levels.
Case sharing:
The program0 program is as follows:
Progcall(program1);
The program1 program is as follows:
Progcall(program2);
The program2 program is as follows:
Progcall(program3);
The program3 program is as follows:
Progcall(program4);
The program4 program is as follows:
Progcall(program5);
The program5 program is as follows:
Progcall(program6);
The program6 program is as follows:
Progcall(program7);
The program7 program is as follows:
Progcall(program8);
The program8 program is as follows:
Progcall(program9);
If the programs are as shown above, running program0 reports error 3820: the subprogram nesting depth is 9 levels, exceeding 8 levels.