"The iTunes Library file cannot be saved."
I've been seeing this for a while, though it seems to be more frequent with iTunes 12.3.2.5. Periodically - and typically when I've had iTunes open for several hours and/or have been adding/editing items to the library - this message will pop up:
Once it appears it will then repeat regularly and won't go away until I exit and restart iTunes. Watching memory utilization in Task Manager doesn't show that iTunes' memory usage is spiking when the error appears (indeed, it doesn't seem to be directly associated with Get Info operations where iTunes' memory usage can jump from a typical 10-15% to 50% or more). Interestingly, this seems to be confined to the one 32-bit system (Windows 10) on which I run my full iTunes library. The two other systems on which I use the same library are both 64-bit (one Windows 7, one Windows 10). However, the 32-bit system is the one on which I maintain my master iTunes library, the others just being used for playback, so I can't be sure that its a direct consequence of the differences in Windows architecture. The library is relatively large (5000+ albums, 85000+ songs) though I know of others with much larger libraries who've not reported seeing this error.
In most cases when I exit iTunes it goes through the normal "Saving iTunes library" step without further errors and everything's as it should be on restart - on a few occasions, though, this seems to be skipped and any recent updates to the library haven't been saved correctly (and checking the timestamp on the iTunes Library.itl file confirms that the last update occurred before exiting iTunes.
Anyone seen this happening and/or have any thoughts on possible steps to mitigate or solve it?
iPod nano (7th generation), Windows 10