convertsegfilestops: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/convertsegfilestops - from package: leptonica-progs

You may install the required package with command apt-get install {package}

Error in other languages:
convertsegfilestops: bevel nie gevind nie
convertsegfilestops: comandă negăsită
convertsegfilestops: comando não encontrado
convertsegfilestops: commande introuvable
convertsegfilestops: command not found
convertsegfilestops: käsku ei ole
convertsegfilestops: không tìm thấy lệnh
convertsegfilestops: komanda nerasta
convertsegfilestops: Kommando nicht gefunden.
convertsegfilestops: kommandot finns inte
convertsegfilestops: komut yok
convertsegfilestops: nie znaleziono polecenia
convertsegfilestops: níor aimsíodh an t-ordú
convertsegfilestops: no se encontró la orden
convertsegfilestops: no s'ha trobat l'ordre
convertsegfilestops: opdracht niet gevonden
convertsegfilestops: parancs nem található
convertsegfilestops: perintah tidak ditemukan
convertsegfilestops: príkaz nenájdený
convertsegfilestops: příkaz nenalezen
convertsegfilestops: команда не найдена
convertsegfilestops: командата не е открита
convertsegfilestops: 命令找不到
convertsegfilestops: コマンドが見つかりません