Anyone know how to get /WAIT on the START command to work when Mp3tag is already running? My batch file uses START "" /WAIT "%~dp0tools\Mp3tag\Mp3tag.exe" /fp:"temp\" to run Mp3tag and wait for completion before for processing commands, but it fails to wait if Mp3Tag is already running. Thanks. …

I think this is only possible if you have several start commands in the same batch file. If you try to open several instances of MP3tag then it is not possible as theses instances start independently from each other and then discover that there is already an instance running.

Thanks. I'm not trying to open several instances. I'm trying to open a single instance in this batch file. The failure occurs if there is already in instance open when the batch file starts.

If you start the batch file and there is already an open MP3tag then you do open several instances. The batch file only knows abouts its very local environment so that one command in the chain can listen to the response of the previous command. Everything that runs outside this environment is not …

[image] ohrenkino: If you start the batch file and there is already an open MP3tag then you do open several instances. I don't see several instances. I see the batch file command take control of the existing instance. [image] ohrenkino: So as it is not possible to start several instances…

[image] chrisjj: ... I see the batch file command take control of the existing instance. ... Mp3tag is a windows application but not a command line application. Once Mp3tag has been started from the command line, the windows process get its own environment and has no further binding to the c…

[image] DetlevD: Once Mp3tag has been started from the command line, the windows process get its own environment and has no further binding to the command process. That's not what I see. When START /WAIT works, it works. [image] DetlevD: Furthermore Mp3tag checks itself if it has been st…

[image] chrisjj: That's not what I see. When START /WAIT works, it works. ... Yes, my bad, you are right. For example ... START "" /WAIT notepad.exe ... will wait until notepad has been closed. That's the same when starting Mp3tag.exe. Huh, what was the problem, please? Ah yes I see, t…

[image] DetlevD: Ah yes I see, the new still invisible Mp3tag process will be killed immediately. And the command script takes the next step. Yup, that's it. [image] DetlevD: Maybe you can try pskill.exe from the Sysinternals suite. Thanks. That works. Which is a surprise, since nowh…

[image] chrisjj: Yup, that's it. Thanks. That works. Which is a surprisae, since nowhere do I see that pslist is supposed to set %errorlevel%. ... Thanks again. This is a big improvement, because it also prevents that command Mp3tag.exe running a different and incompatible version of the app (I …

[image] DetlevD: you may rename Mp3tag.exe version 2.44 to another name like "Mp3tag244.exe" and run it under that name, so you can see it in the processlist with that name and decide what to do. Yes, that would be even safer - thanks. [image] DetlevD: Renaming seems not to change the be…

Getting START /WAIT to work when app already running

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chrisjj November 14, 2013, 9:19pm 15

Again, see /t/15071/1 .