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Can't open msl log in Virtual Dyno

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Old Sep 23, 2025 | 04:55 PM
  #1  
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Default Can't open msl log in Virtual Dyno

Brand new to this, just been figuring out tuning in real time. Haven't gotten into logging anything too much, so I'm not super familiar with the software. Did a couple third gear pulls and logged it as MSL in megalogviewer, and i cant open the logs up in virtual dyno, it gives me an error saying "MISSING COLUMNS: Time, RPM, Throttle Position" I did some research and saw people tweaking stuff on excel, which i don't have so i messed with a copy of the file on notepad to no success. Here are a couple of my logs. Thanks for the help in advance!
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File Type: msl
D2.msl (52.5 KB, 25 views)
File Type: msl
D3.msl (51.0 KB, 22 views)
Old Sep 23, 2025 | 07:04 PM
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Open up the log files in a text editor (like notepad). Remove the first two lines - the ones in double quotes that contain your firmware version and capture date. The first line should then be the actual header row that starts with "Time". Now, within that row, remove all of the parentheses characters that occur - in particular, you have some truncated field names that have a left-parenthesis character in them. Save the changes and you should be able to load the resulting file.
Old Sep 23, 2025 | 07:08 PM
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This worked perfectly, thank you very much!
Old Sep 23, 2025 | 07:27 PM
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Nice! I've also used MegalogViewer to convert the logs as well with success. I think you have to have the paid version though for that.
Old Sep 24, 2025 | 12:58 PM
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There's also a way to change the text that Virtual Dyno looks for in the logs. Basically you can override the expected column labels to the ones that MLV automatically applies.

I don't remember the exact way to do that right now, but it makes it so you don't have to manually adjust every log.
Old Sep 24, 2025 | 01:33 PM
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Originally Posted by SimBa
There's also a way to change the text that Virtual Dyno looks for in the logs. Basically you can override the expected column labels to the ones that MLV automatically applies.
I don't remember the exact way to do that right now, but it makes it so you don't have to manually adjust every log.
The necessary columns were already the names that VD looks for by default. The problem was that it couldn't parse out the header row, so it couldn't find anything. I would guess that the parsing routine expects to see a closing right-parenthesis for every opening left-parenthesis. The OP has logged fields that include only a left-parenthesis - there might actually be a bug in the MLV conversion from MLG to MSL that is dropping the right-parenthesis, as I'd guess that the fields actually have the closing parenthesis in the original log file, and the field names are short enough that they shouldn't actually be truncated. Consider that two of the problem fields were "VE (Current" and "Duty Cycle (Staging" - if it was just limiting length, they should both be the same length, but since they are different lengths but both missing the closing parenthesis, it seems like a bug.

I'm not sure why the initial comment header lines had to be removed as well, but it was still failing to parse when I left them in. No strange characters or anything in those when comparing to the logs from my MS2 that VD parses just fine.
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