How to open and write the same file multiple times (CWRITE)?

    Hello

    I am trying to write multiple lines into one file but in different time (like a log file), but I did not success.

    I tried this on KSS 8.6.x

    I am able to write multiple lines at one time like this, but this is not what I need:

    Code
    CWRITE($FCT_CALL,stateT,modusT,"krl_fopen",sPath[],"a",iHandle)
CWRITE($FCT_CALL,stateT,modusT,"krl_fwriteln",iHandle, "Data 1")
CWRITE($FCT_CALL,stateT,modusT,"krl_fwriteln",iHandle, "Data 2")
CWRITE($FCT_CALL,stateT,modusT,"krl_fwriteln",iHandle, "Data 3")
CWRITE($FCT_CALL,stateT,modusT,"krl_fclose",iHandle)

    I want this to work:

    I tried all the "Mode for opening" variables (r, a, w ... ) without success.

    The krl_fopen works fine at the first time, creates the file, write into it and close it, but at the 2nd time I am not able to open it, I got error MSG_NO = -2 => "Operation failed"

    How can I open and write the same a file several time?

    This is the source code:

  • Lemster68 February 20, 2024 at 2:14 PM

    Approved the thread.

    Hello, did you checked this part in the code(line 30 & 31), in CWRITE, you have "krl_fwriteln" and checkSTAT you have "krl_fprintf".

    Maybe if you put in CWrite also "krl_fprintf" it would be OK.

    Code
      CWRITE($FCT_CALL,stateT,modusT,"krl_fwriteln",iHandle, sData[])   
  CheckSTAT("krl_fprintf", stateT)

    So, you want to append to an existing file, correct? Is this a text or binary file? This would be mode "a" for a text file, "ab" for binary.

    krl_fopen returning a -2 indicates that the file is already outside of KRL, or does not exist:

    Do you have this file open in some other program, like Notepad, when this error occurs? Is this file local on the robot, or on a remote network mount?

    I've attached a utility module that I've used on many robots over the years, and the File Open and File Append routines worked reliably. You could give them a shot.

    Quote from DannyDJ

    Hello, did you checked this part in the code(line 30 & 31), in CWRITE, you have "krl_fwriteln" and checkSTAT you have "krl_fprintf".

    Maybe if you put in CWrite also "krl_fprintf" it would be OK.

    Code
      CWRITE($FCT_CALL,stateT,modusT,"krl_fwriteln",iHandle, sData[])   
  CheckSTAT("krl_fprintf", stateT)

    I checked the CheckSTAT("krl_fprintf", stateT) line, krl_fprintf is just an info for the Error handling part.

    I also tested printf, without success.

    Quote from SkyeFire

    So, you want to append to an existing file, correct? Is this a text or binary file? This would be mode "a" for a text file, "ab" for binary.

    krl_fopen returning a -2 indicates that the file is already outside of KRL, or does not exist:

    Do you have this file open in some other program, like Notepad, when this error occurs? Is this file local on the robot, or on a remote network mount?

    I've attached a utility module that I've used on many robots over the years, and the File Open and File Append routines worked reliably. You could give them a shot.

    Yes, append an existing .txt file, I use "a" parameter.

    I got error -2, but as far as I see, the file is not used by anything, because I am able to delete the file in Windows Explorer.

    It is a local file, not a network one, actually I use KUKA.OfficeLite, that must be the same behavior like a real controller.

    I checked your program, the fundamental is the same like in my program.

    Robot is not able to open the file, only once when it is created.

    The below line simple doesn't work if the file already exist, although it has 1 line content and Windows is able to delete it ....

    CWRITE($FCT_CALL,stateT,modusT,"krl_fopen",sPath[],"a",iHandle)

    i have tested this code in my OL 8.6.7 and it works, i only replaced the sPath with "logg.txt"

    Maybe the second time while trying to write in the same file your sPAth[] variable gets corrupted in here

    Code
    IF stateTIN.RET1 == #CMD_ABORT THEN            
ON_ERROR_PROCEED      
sPath[] = sPath[]

    This simple code does not work either on my KUKA.OfficeLite 8.6.

    Works only once at first run, but not able to open the file anymore, I always got error -2.

    Something is wrong with my OfficeLite? But what?

    Quote from GaborGraczer

    This simple code does not work either on my KUKA.OfficeLite 8.6.

    Works only once at first run, but not able to open the file anymore, I always got error -2.

    Something is wrong with my OfficeLite? But what?

    Do you have robot and try on real robot controller? Your code worked fine on my OfficeLight KSS 8.6.7 but this is inside VMWARE Player, maybe you have some setting there. Or maybe talk to KUKA directly(they will know if they have some bug in your version, describe the problem) and maybe they wil send you newer version of OL. In the past I have had also some problems with some versions of OL throwing weird errors that it shouldn't be throwing, they send me newer version, and same program worked OK in newer version worked OK, or try and reinstall your version, but the I guess you will have to redo licence.

    Quote from DannyDJ

    Do you have robot and try on real robot controller? Your code worked fine on my OfficeLight KSS 8.6.7 but this is inside VMWARE Player, maybe you have some setting there. Or maybe talk to KUKA directly(they will know if they have some bug in your version, describe the problem) and maybe they wil send you newer version of OL. In the past I have had also some problems with some versions of OL throwing weird errors that it shouldn't be throwing, they send me newer version, and same program worked OK in newer version worked OK, or try and reinstall your version, but the I guess you will have to redo licence.

    I made several restarts ... did not help. I will test it on a real robot, but today I am at Home Office, that's why the OfficeLite would be good ...

    I will reinstall the OfficeLite 8.6 to see if it helps. I also have OfficeLite 8.7, unfortunately there I have license issues.

    I will come back with the outcome once ...

    Thanks for the comments and replays, I far as I see based on your comments my code is working but not on my OfficeLite system.

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