Variable "$CONFIG" is not imported at ./Chapter9_Exer3 line 15.
Variable "$OUTPUT" is not imported at ./Chapter9_Exer3 line 20.
syntax error at ./Chapter9_Exer3 line 8, near "'three_Freds.out':"
Can't use global $0 in "my" at ./Chapter9_Exer3 line 12, near "Usage: $0"
Global symbol "$CONFIG" requires explicit package name at ./Chapter9_Exer3 line 15.
Global symbol "$OUTPUT" requires explicit package name at ./Chapter9_Exer3 line 20.
Execution of ./Chapter9_Exer3 aborted due to compilation errors.