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Teraterm log and replay functions

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Log and replay functions

You can save the host data to the file if you use Tera Term logging function.

Log to the file

You can log characters received from the host. Execute the [File] Log command to start logging.

Do in the following commands:

  1. Do [File] Log command.
  2. "Tera Term: Log" dialog box will be shown.

    Input the saving file name to `File Name:'.
    All host data will be written to the file if you check `Binary' option.
    KANJI, CR and LF codes are converted to host character code, written to the file if you uncheck `Binary' option. However, the escape sequences are not written to the file.
    The host data will append the file if you check `Append' option.
    The host data will overwrite the file if you uncheck `Append' option.

  3. Push OK button, "Tera Term: Log" icon will be shown. And logging will start.
  4. Push Close or Pause button on the logging dialog box if you finish the logging or temporarily stop. Pause button will change into Start button if you push Pause button, the logging will restart.

To browse log files, which contain escape sequences, it is convenient to use the replay function of Tera Term. To replay a log file.

Replay the log file

Run Tera Term with command line in the following:

TTERMPRO /R=<log file name>

Tera Term analyzes the specified log file and understands the escape sequence datas. If so, the contents of log file will be displayed in Tera Term window as if the characters were received from the host. We call this function 'replay log'.

And also, you can also use 'Host:' on the [File] New connection command.

/R=<log file name>

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Old News ;-)

[Nov 20, 2014] Logging must be per line not per character

TeraTerm Support Forums 

Post subject: Re: TeraTerm Logging must be per line not per character

Mar 07, 2012 5:26 am 

I have been using TeraTerm for last 3 years now. I am using version 4.69 currently.

I have to always log everything I do while testing the products I works on. So I turn on logging in TeraTerm.

I have one problem with TeraTerm Logging. When I mis type the command on my product and press backspace to cancel it, TeraTerm logs even that in the log file. This confuses me a lot when I go thru the logs.

I think TeraTerm must log only after user has pressed "Enter" key. This will have clean log file.

Is there anyway TeraTerm logging can be per line.. rather than per character?

Appreciate your help as this is very important issue for me.



Joined: Wed Jul 26, 2006 4:47 am
Posts: 423
Location: UK

A lot of us certainly would not want the logging to change like this so if it were implemented it should be a configurable item.


Causes Tera Term to pause logging.


Received characters are discarded while logging is paused.


prompt = '$'

wait prompt

; get a user name
getenv 'USERNAME' username
; get the date and time
gettime timestr "%Y%m%d-%H%M%S"

; add the user name and the timestamp to the log file name
sprintf2 filename 'd:\console_%s_%s.log' username timestr
;messagebox filename 'filename'

logopen filename 0 0
logwrite 'Log start'#13#10
sendln 'cal'
wait prompt
; Suspend logging
; The below command is not logging
sendln 'date'
wait prompt
; Resume logging
sendln 'uptime'
wait prompt
logwrite '@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@'#13#10


reading data from telnet session

TeraTerm Support Forums • View topic -


Post subject: reading data from telnet session

Jun 04, 2014 12:45 pm


My telnet server is having some text which scrolling continuously, how can i copy the text to my local computer. simply how can I read server data in telnet session?



Joined: Wed Jul 26, 2006 4:47 am
Posts: 423
Location: UK

Turn logging on maybe?
Click "File" -> "Log"


I got some solution

while result=1
filewriteln file inputstr


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TeraTerm Support Forums • View topic - reading data from telnet session


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