picosat.trace: 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 CentOS possible default full paths are:

/usr/bin/picosat.trace - from package: picosat

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/picosat.trace - from package: picosat

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

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