-7900, Different block sizes, bad page (wrong page type)

[Michael Keller]

hi,    i tried to backup my sapdb with dbmcli. the following error occured:     >backup_start dbfull3-01 MIGRATION DATA   ERR   -24988,ERR_SQL: sql error   -7900,Different block sizes,bad page (wrong page type)     can anyone help me? the backup process stops after 500 mb of written data with this message and i don’t even understand why the message occurs!   thx in advance   michael keller