unable to load hdl file after modification

Posted by hemasaad on Jul 09, 2017; 11:34am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/unable-to-load-hdl-file-after-modification-tp4031174.html

before editing the implementation part in the hdl file. I can load the file but after any change I can't load it again to the hardware simulator. can anyone help me?
this is the code after edit

CHIP Or {
    IN a, b;
    OUT out;

    PARTS:
    // Put your code here:
        nand(......., out=);
       
       
}
and I get this error message

but the file is at this path