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Identify Empty File in Skill

amaru

Hi everyone,

I reading a file by following command:

while(gets(LinValue myFile)

;;; body 

);while ends

When file is empty, I am getting following error : 

*Error* range: argument #1 should be a number (type template = "n") - nil
*Error* load: error while loading file - "*string*"

I am checking the file with isFile(myFile), but my file exists but is empty. How can I check if file is empty using SKILL? or any other solution to this problem.

Thanks in advance

Amar

Parents

  • Hi,

    I do not get this error for an empty file, may I see the entire code please.

    Max

  • in reply to mbracht

    Thank you Matthias and Max for your response.

    fileLength is exactly what I was looking for. Thank you Matthias.

    Max,

    After you pointed out, I again debugged the issue and found out that the error was not due to while(gets(... ...)). 

    Actually there were some variables which needs to be assigned inside while loop and then following command was invoked ::

    geAddHilightLabel(evalstring(highlightID) X1:Y1 "someSignal" "centerCenter" "R0" "stick" 0.01 t)

    X1 and Y1 were nil because code didn't gone inside the loop, that is why the error was coming. I am sorry, I didn't looked carefully earlier. 

    I was making a file through some linux functions and sometimes they can be empty isFIle(....) was not working for me. But now fileLength is working as expected.

    Thanks again

    Amar

Reply
  • in reply to mbracht

    Thank you Matthias and Max for your response.

    fileLength is exactly what I was looking for. Thank you Matthias.

    Max,

    After you pointed out, I again debugged the issue and found out that the error was not due to while(gets(... ...)). 

    Actually there were some variables which needs to be assigned inside while loop and then following command was invoked ::

    geAddHilightLabel(evalstring(highlightID) X1:Y1 "someSignal" "centerCenter" "R0" "stick" 0.01 t)

    X1 and Y1 were nil because code didn't gone inside the loop, that is why the error was coming. I am sorry, I didn't looked carefully earlier. 

    I was making a file through some linux functions and sometimes they can be empty isFIle(....) was not working for me. But now fileLength is working as expected.

    Thanks again

    Amar

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