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Unknown error on iPad when running web study


Unknown error on iPad when running web study
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AKrishna
AKrishna
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posted Last Month
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Another new one for me - I recently set up a web study (https://mili2nd.eu/rzmc) and tested it on my Windows 11 laptop, where it worked fine. However, another user later tested it using an 11'' 2nd Gen iPad Pro (OS/X 18.6.2) and had a strange issue where the first script in the batch ran normally, but Inquisit then quit, showing a "The study encountered errors - the researcher has been notified" screen, but no error code. The logs show no errors, simply a lack of data files for the remaining scripts which didn't run. Any ideas?

The iPad model number is MY252FD/A, if that helps!
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Dave
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AKrishna - 8/27/2026
Another new one for me - I recently set up a web study (https://mili2nd.eu/rzmc) and tested it on my Windows 11 laptop, where it worked fine. However, another user later tested it using an 11'' 2nd Gen iPad Pro (OS/X 18.6.2) and had a strange issue where the first script in the batch ran normally, but Inquisit then quit, showing a "The study encountered errors - the researcher has been notified" screen, but no error code. The logs show no errors, simply a lack of data files for the remaining scripts which didn't run. Any ideas?

The iPad model number is MY252FD/A, if that helps!

Have you checked the app log on the iPad? Tests tab in the Inquisit Player app, tap Log in the upper right corner.

Wild guess, just looking at the files: MPEG is ancient as a codec. I would encode the videos with a modern codec (H.264 in a MP4 container).
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AKrishna
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AKrishna
posted Last Month ANSWER
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It looks like your wild guess was on the money. I re-encoded the videos as you suggested and now the iPad is running the experiment. Just for completeness, here's a local log of one failed runthrough on the iPad from before the new videos were uploaded:

2026-08-27T05:38:01.215    InquisitPlayer    6.6.3    6611    InquisitPlayer    Data Manager    Stop Uploads    Pending Data=0
2026-08-27T05:38:01.218    InquisitPlayer    6.6.3    6611    InquisitPlayer    Start Test Online    Script='prodi_all_test'    Account=4351    ScriptPath=https://scripts.millisecond.eu/elkehoffmann/prodi_all_test/klasse 3 und 4 alle subtests.iqx    HomeServer=eu.mili2nd.net    DataUrl=''    FinishPage=https://eu.mili2nd.net/inquisit6/finish    Monkey=human    SessionId=1    GroupId=67    SubjectId=m_dlhkn0u1qhk9
2026-08-27T05:38:01.934    InquisitPlayer    6.6.3    6611    accountId='4351'    License Check Successfull.
2026-08-27T05:38:01.934    InquisitPlayer    6.6.3    6611    InquisitPlayer    License Check    Result=1    AccountId=4351    ExperimentId=78641    ExperimentName=prodi_all_test    ScriptName=78641    Offline=0    isCached=1    ScriptUrl=https://scripts.millisecond.eu/elkehoffmann/prodi_all_test/klasse 3 und 4 alle subtests.iqx
2026-08-27T05:38:02.022    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/klasse 3 und 4 alle subtests.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Graphics=QtOpenGL    ColorDepth=24    ScreenWidth=1194    ScreenHeight=809    RefreshRate=120    VidoeSync=WaitForVerticalBlank
2026-08-27T05:38:02.022    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/klasse 3 und 4 alle subtests.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Graphics    isTablet=0    isScrollable=0    hasResponseView=0
2026-08-27T05:38:02.247    InquisitPlayer    6.6.3    6611    InquisitPlayer    NotifyTracker    Success    Script='prodi_all_test'    Account=4351    ScriptPath=https://scripts.millisecond.eu/elkehoffmann/prodi_all_test/klasse 3 und 4 alle subtests.iqx    HomeServer=eu.mili2nd.net    DataUrl=''    FinishPage=https://eu.mili2nd.net/inquisit6/finish    Monkey=human    SessionId=1    GroupId=67    SubjectId=m_dlhkn0u1qhk9
2026-08-27T05:38:02.247    InquisitPlayer    6.6.3    6611    Network    Requests Remaining=0    Completed all pending requests.
2026-08-27T05:38:02.252    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/klasse 3 und 4 alle subtests.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Script starting...    Cached=0    isOffline=0    isNetworkReachable=1
2026-08-27T05:38:02.560    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Script starting...    Cached=0    isOffline=0    isNetworkReachable=1
2026-08-27T05:38:04.256    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Opened Temporary DataFile='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Application Support/Millisecond Software/Inquisit Player/pending/files/raw_anfang_stopp_raw_m_dlhkn0u1qhk9_2026-08-27-12-38-02-277.iqdat'. Found FileSize=0 bytes.
2026-08-27T05:38:04.260    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Script finishing...    Cached=0    isOffline=0    isNetworkReachable=1    hasData=1
2026-08-27T05:38:04.274    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Closed Temporary DataFile='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Application Support/Millisecond Software/Inquisit Player/pending/files/raw_anfang_stopp_raw_m_dlhkn0u1qhk9_2026-08-27-12-38-02-277.iqdat'. Found FileSize=299 bytes
2026-08-27T05:38:04.275    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    ResultsManager    storeData    Write HTTP Scheduling Upload of raw_anfang_stopp_raw_m_dlhkn0u1qhk9_2026-08-27-12-38-02-277.iqdat
2026-08-27T05:38:04.275    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    PostHttpData    Write HTTP Scheduling Upload of anfang_stopp_raw_m_dlhkn0u1qhk9_2026-08-27-12-38-02-277
2026-08-27T05:38:05.588    InquisitPlayer    6.6.3    6611    Script='/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/Library/Caches/Millisecond Software/Inquisit Player/scripts/78641_100495664d383cb8183298121523decd/anfang_stopp.iqx'    GroupID=67    SubjectID=m_dlhkn0u1qhk9    Script completed successfully.
2026-08-27T05:38:06.306    InquisitPlayer    6.6.3    6611    InquisitPlayer    DataUploads    Starting Upload
2026-08-27T05:38:06.306    InquisitPlayer    6.6.3    6611    InquisitPlayer    Data Manager    Start Uploads    Pending Data=0    Visible=0
2026-08-27T05:38:06.306    InquisitPlayer    6.6.3    6611    InquisitPlayer    Finished Test    Failed    Script='prodi_all_test'    Account=4351    ScriptPath=https://scripts.millisecond.eu/elkehoffmann/prodi_all_test/klasse 3 und 4 alle subtests.iqx    HomeServer=eu.mili2nd.net    DataUrl=''    FinishPage=https://eu.mili2nd.net/inquisit6/finish    Monkey=human    SessionId=1    GroupId=67    SubjectId=m_dlhkn0u1qhk9    RuntimeMessageCount=13
2026-08-27T05:38:06.307    InquisitPlayer    6.6.3    6611    InquisitPlayer    Data Manager    Stopping Uploads    NetworkReachable=1    Pending Data=0
2026-08-27T05:38:08.085    InquisitPlayer    6.6.3    6611    Open Web Page Local    URL=file:///private/var/mobile/Containers/Data/Application/A74B59CA-A848-49FD-8D74-A018D85DA984/tmp/InquisitPlayer/Errors.htm


Thanks for your help as always!
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Dave
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posted Last Month ANSWER
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Excellent -- thanks for letting me know!
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