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I was wondering what the criteria are for writing to the log file.
Does the QVW have to complete running before any log data is available?
I have a QVW that is frozen but when I look at the log file it shows the previous runs information.
Then the log file will only be written when the entire script has finished, so it seems.
v11.20 and earlier start writing to the log as soon as script execution starts (thereby offering you a chance to check what is going on), not so in v12...
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What version of QlikView are you using?
when a QVW run completely with or without script error a log file is generated.
In your case log file was'nt generated as the qvw did not run completely i.e. hung up in the middle.
How is one supposed to troubleshoot the issue with the freeze if I can't see the log file?
Have you tried to step though your script using the debug function in the script editor? You might want to try a limited load as well.
Also consider that in directory %ProgramData%\QlikTech\QlikView you will find logs being written by the engine. As soon as the scripts are finished, the logs are moved to the qvw origin directory.
I always look at this directory to follow script execution.