dude,critical db failure: database disk image is malformed

RouterOS Beginner Basics
1

I just created a CHR VM on Proxmox - (credit to smileymattj https://www.youtube.com/watch?v=wI98U1WBFFI )

There is 10G free space and the issue I have is that on dude database FTP upload stops around 100M on any of my backup’s - (note my backup’s are from
Dude 4.0beta3 which I am now migrating to 6.48.3 )

Is this a limitation on the free licence and while I have no problem in purchasing a licence, I don’t to discover that this a limitation on the CHR !

2

Ok solved the incomplete ftp file transfer !

Now I have “echo: dude,critical db failure: database disk image is malformed”

Any suggestions as the dB is working OK on Dude 4.0beta3

3

The database is incompatible with new versions.

I try on the past to convert from 4 to 6, but after some time the “converted” database do everytime problem.

Starting from scratch on 6.x and no problem till now.

4

Got the issue fixed by
(1) first importing and applying my oldest backup 2019 which worked - I copied the dude.db
(2) then imported a 2020 backup ( dude prompted about vacuuming …) worked OK - once again copied dude.db
(3) then I imported a backup created 3 days ago and this gave the malformed disk image !
(4) I deleted dude.db and brought back a working dude.db from earlier and it worked OK
(5) I created another backup from V4 and imported - this now working OK