MonoDevelop.Projects.Formats.MSBuild.exe.config: 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/lib/monodevelop/bin/MonoDevelop.Projects.Formats.MSBuild.exe.config - from package: monodevelop
/usr/lib/monodevelop/bin/MSBuild/2.0/MonoDevelop.Projects.Formats.MSBuild.exe.config - from package: monodevelop
/usr/lib/monodevelop/bin/MSBuild/3.5/MonoDevelop.Projects.Formats.MSBuild.exe.config - from package: monodevelop
/usr/lib/monodevelop/bin/MSBuild/4.0/MonoDevelop.Projects.Formats.MSBuild.exe.config - from package: monodevelop

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

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