Is there a limit on how many songs can be added to MP3TAG?

[ohrenkino]

Try to load the files with the library function switched on.
(File>Options>Library)
Yes, there is a limit due to the addressable memory space of a 32-bit-application which is some 4 GB.

See also e.g. here:

Not enough memory / Runtime error

Right clicking my music collection folder in order to open it in Mp3tag, Results in reading directory... until I get this error message: https://gyazo.com/73bfaeb02c689001b0db928cfbbf96ec When clicking ok, I get the following message: https://gyazo.com/9fc80c416b5e902c52f1d79af522a54e Reading this topic, [F] Not enough memory addressable to complete the operation!, I've made sure to test my FLAC files with AudioTester64 and re-rippped/downloaded the ones that were either Truncated, LostSync…