psiconv-config: command not found

Have You tried accessing the binary with the full path?

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 CentOS possible default full paths are:

/usr/bin/psiconv-config - from package: psiconv-devel

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