h5pcc: 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/lib64/mpich/bin/h5pcc - from package: hdf5-mpich-devel
/usr/lib/mpich/bin/h5pcc - from package: hdf5-mpich-devel
/usr/lib64/openmpi/bin/h5pcc - from package: hdf5-openmpi-devel
/usr/lib/openmpi/bin/h5pcc - from package: hdf5-openmpi-devel

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

Error in other languages:
h5pcc: bevel nie gevind nie
h5pcc: comandă negăsită
h5pcc: comando não encontrado
h5pcc: commande introuvable
h5pcc: command not found
h5pcc: käsku ei ole
h5pcc: không tìm thấy lệnh
h5pcc: komanda nerasta
h5pcc: Kommando nicht gefunden.
h5pcc: kommandot finns inte
h5pcc: komut yok
h5pcc: nie znaleziono polecenia
h5pcc: níor aimsíodh an t-ordú
h5pcc: no se encontró la orden
h5pcc: no s'ha trobat l'ordre
h5pcc: opdracht niet gevonden
h5pcc: parancs nem található
h5pcc: perintah tidak ditemukan
h5pcc: príkaz nenájdený
h5pcc: příkaz nenalezen
h5pcc: команда не найдена
h5pcc: командата не е открита
h5pcc: 命令找不到
h5pcc: コマンドが見つかりません