0020936: Uncaught Error: Cannot read properties of null - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update

0020936	MMW 5	General	public	2024-05-23 20:20	2024-06-05 22:52

Reporter	zvezdan	Assigned To
Priority	urgent	Severity	crash	Reproducibility	always
Status	closed	Resolution	reopened
Product Version	5.1
Target Version	5.1	Fixed in Version	5.1

Summary	0020936: Uncaught Error: Cannot read properties of null
Description	I am getting this error when changing skin in 3021, but not with 3005. Portable installation, default empty Portable folder without added database file, any script or skin, only having added persistent.json and mediamonkey.m3u8 files attached here. In fact, mediamonkey.m3u8 could have anything inside, references to existing or non-existing files, but it should exists. That persistent.json is trimmed down my file form old installation, after I located which its part causes the error followed by a lot of experiments. So, copy these two files into Portable folder, start the program and switch from Material Design to Flat Monkey -> error. If you don't get it, let me know and I will make a debug log since I could reproduce it always, but I am sure you will get that error as well.
Tags	No tags attached.
Attached Files	persistent.json (2,708 bytes) { "layout_state_Desktop": { "subNodesState": { "mainContentDiv": { "subNodesState": { "innerbodyFlex": { "state": { "hasSplitters": true }, "subNodesState": { "nowplayingVerticalSplitter": { "siblings": { "mainpanel": { "flexGrow": "962" }, "nowplaying": { "width": "220px" } } }, "nowplaying": { "state": { "hasSplitters": true, "manualVisibilityState": true }, "subNodesState": { "nowplayinglistContainer": { "layout": "list", "layoutState": { "NowPlayingTracklist": { "focusedIndex": -1, "itemCount": 10, "scrollOffset": 0, "popupShown": false } } }, "splitterForartWindow": { "siblings": { "nowplayinglistContainer": { "flexGrow": "285" }, "artWindow": { "height": "" } } }, "artWindow": { "mode": "selectedTrack", "layout": "advanced", "visible": true } } } } } } } } } } persistent.json (2,708 bytes) mediamonkey.m3u8 (102 bytes) #EXTM3U #EXTINF:265,Peter Gabriel - Solsbury Hill ..\..\..\Music\Peter Gabriel - Solsbury Hill.ogg mediamonkey.m3u8 (102 bytes) Uncaught Error - Cannot read properties of null.png (30,385 bytes) Uncaught Error - Cannot read properties of null.png (30,385 bytes)

Fixed in build	3028

Ludek 2024-05-24 09:49 developer ~0075533	Fixed in 3023

peke 2024-05-27 00:18 developer ~0075553	Verified 3024

zvezdan 2024-05-30 15:46 updater ~0075639	The new version works fine my old Portable folder with its db/json and other files. However, the fresh installation still has an issue with the json file that I have posted. Steps: - Install program in portable mode to the new folder; - choose No on the end of installation to skip start of the program; - copy the posted json file to the Portable folder (.m3u8 file doesn't matter); - start the program and choose Cancel to skip adding an old database and another Cancel to skip Wizard -> Home view shows nothing; - switch to Flat Monkey -> the program disappears and doesn't show up anymore, leaving all processes in memory. It is not a big deal since the program is working fine now with my full json file from my previous installation, but I thought maybe you could see why this thing is happening with that truncated json file.

Ludek 2024-06-03 20:23 developer ~0075704 Last edited: 2024-06-03 20:23	Good catch, actually debugging this and it is not related to the current persistent.json, but to a bug in closing embedded windows (those used for web pages). The similar can be easily reproduced like this: 1) Run MM5 2) Switch to Web node 3) Switch out of web node (to close the embedded web window) 4) Switch skin => nothing happens

Ludek 2024-06-03 20:36 developer ~0075705	Fixed in 3028

zvezdan 2024-06-03 20:37 updater ~0075706 Last edited: 2024-06-03 20:43	So, is it related to the 0020981 issue? Similar testing environment, but without any persistent.json file copied to the Portable folder. And I suppose the another issue that I reported is related as well (0020980).

peke 2024-06-05 22:52 developer ~0075790	Verified 3028