LPUT expected input to be a list but got the number 0 instead.

[parichehr mandegaran]

hi 

What's wrong with that?

to create-list-all-year-precipitation

  file-open "PCPyear.txt"

  let Y 2002

  while [Y <= 2017]

  [

    let line file-read-skipComments

    set list-all-year-precipitation lput (item 0 read-from-string item 1 line ) list-all-year-precipitation

    set Y Y + 1

  ]

  file-close

end

to-report file-read-skipComments

  let rep []

  while [(not file-at-end?) and (empty? rep)] [

    let line file-read-line

    if(length line > 0) [

      if ((first line != ";") and (first line != "#") and (first line != "%")) [

        if (position " " line != false) [

          set rep (list (substring line 0 (position " " line)) (substring line ((position " " line) + 1) (length line)))

        ]

      ]

    ]

  ]

  report rep

end

i have this error

LPUT expected input to be a list but got the number 0 instead.

[Charles Staelin]

I suspect that the problem is that list-all-year-precipitation has not been initialized to an empty list.  Since you have used "set" on it, I assume it is a global variable and global variables are initialized by NetLogo to zeros.  If you add the line 

set list-all-year-precipitation [ ] 

right before your "while" statement, it will tell NetLogo that the variable should begin as an empty list, not a number.  It's often a good idea to initialize all globals in your setup procedure to make their initialization explicit.

Charles