Error: No reasonable alternatives for expression Name: 0

Error: No reasonable alternatives for expression Applying untyped: 
    Name: f1
...to: 

Error: No reasonable alternatives for expression Applying untyped: 
    Name: f1
...to: 
constant expression 3 signed int 
Error: No reasonable alternatives for expression Applying untyped: 
    Name: f1
...to: 
constant expression 3 signed int 
Error: No reasonable alternatives for expression Name: 0

Error: No reasonable alternatives for expression Name: 0
with designator:  Name: j

Error: No reasonable alternatives for expression Name: 0
with designator:  Name: j

Error: No reasonable alternatives for expression Name: 0
with designator:  Name: j

Error: No reasonable alternatives for expression Name: 0
with designator:  Name: j

Error: No reasonable alternatives for expression Applying untyped: 
    Name: f2
...to: 
with designator:  Tuple:
          Name: j

          Name: i