Sun Feb 19, 2017 6:16 pm
If I may pop in, have you tried splitting the file up (as opposed to one large file)?
The option is under the General tab, in the "Auto Complete Recording" section (SETTING button).
In here, you can configure Bandicam to create a new file (and continue recording) after either a certain period of time, or a certain file size.
This may assist in recording for long periods of time (it solves many problems with Windows handling large files, the drive handling large files, etc).
I only mention this because I have recorded up to 17 hours; but I utilized the option of splitting the file up into several output files (I have not tried over 20 hours of recording).
Perhaps there are other reasons why you cannot split up your recorded files - but this is just a Suggestion to try... Good luck with it!