mscorlib.dll missing after trying to run mattercontrol (Mono installed)

Installed both Mono and MatterControl. A nasty little error occurred, mscorlib.dll file not found.

Operating System Version Linux 20.04

$ dpkg -l mono-complete Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description ++±==============-=================================-============-========================================================== ii mono-complete 6.12.0.122-0xamarin1+ubuntu2004b1 amd64 complete Mono runtime, development tools and all libraries

$ dpkg -l mattercontrol Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad) ||/ Name Version Architecture Description ++±==============-=============-============-================================= ii mattercontrol 2.19.10.10367 all Software solution for 3D printers

$ which mattercontrol /usr/bin/mattercontrol dio@dio3dpsrv:~$ mattercontrol Time to ‘’: 228 exception inside UnhandledException handler: (null) assembly:/usr/lib/mono/4.5/mscorlib.dll type:FileNotFoundException member:(null)

[ERROR] FATAL UNHANDLED EXCEPTION: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. File name: ‘Microsoft.VisualBasic, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ at Mindscape.Raygun4Net.RaygunMessageBuilder.SetEnvironmentDetails () [0x0000b] in <f91f2b249ee243acbec1dd6bfd729d19>:0 at Mindscape.Raygun4Net.RaygunClient.BuildMessage (System.Exception exception, System.Collections.Generic.IList1[T] tags, System.Collections.IDictionary userCustomData, Mindscape.Raygun4Net.Messages.RaygunIdentifierMessage userInfoMessage, System.Nullable1[T] currentTime) [0x00024] in <f91f2b249ee243acbec1dd6bfd729d19>:0 at Mindscape.Raygun4Net.RaygunClient.StripAndSend (System.Exception exception, System.Collections.Generic.IList1[T] tags, System.Collections.IDictionary userCustomData, Mindscape.Raygun4Net.Messages.RaygunIdentifierMessage userInfo, System.Nullable1[T] currentTime) [0x00016] in <f91f2b249ee243acbec1dd6bfd729d19>:0 at Mindscape.Raygun4Net.RaygunClient.Send (System.Exception exception, System.Collections.Generic.IList`1[T] tags, System.Collections.IDictionary userCustomData, Mindscape.Raygun4Net.Messages.RaygunIdentifierMessage userInfo) [0x00023] in <f91f2b249ee243acbec1dd6bfd729d19>:0 at Mindscape.Raygun4Net.RaygunClient.Send (System.Exception exception) [0x00000] in <f91f2b249ee243acbec1dd6bfd729d19>:0 at MatterHackers.MatterControl.Program+<>c.<Main>b__6_2 (System.Object s, System.Threading.ThreadExceptionEventArgs e) [0x0001c] in <e58f04b6857344df9781155f8ee2c0c8>:0 at System.Windows.Forms.Application.OnThreadException (System.Exception t) [0x00037] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.NativeWindow.OnThreadException (System.Exception e) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.NativeWindow.WndProc (System.IntPtr hWnd, System.Windows.Forms.Msg msg, System.IntPtr wParam, System.IntPtr lParam) [0x00196] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.XplatUIX11.SendMessage (System.IntPtr hwnd, System.Windows.Forms.Msg message, System.IntPtr wParam, System.IntPtr lParam) [0x000d5] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.XplatUIX11.CreateWindow (System.Windows.Forms.CreateParams cp) [0x004e5] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.XplatUI.CreateWindow (System.Windows.Forms.CreateParams cp) [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.NativeWindow.CreateHandle (System.Windows.Forms.CreateParams cp) [0x00009] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.Control.CreateHandle () [0x00031] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.Control.CreateControl () [0x00039] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at (wrapper remoting-invoke-with-check) System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.CreateControl () [0x00072] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.Control.SetVisibleCore (System.Boolean value) [0x00057] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.Form.SetVisibleCore (System.Boolean value) [0x00065] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at MatterHackers.Agg.UI.WinformsSystemWindow.SetVisibleCore (System.Boolean value) [0x00009] in <712ffdb4c0144e8c88c0ce33a0b20977>:0 at System.Windows.Forms.Control.set_Visible (System.Boolean value) [0x00009] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at System.Windows.Forms.Control.Show () [0x00000] in <6d635ac3dc1c4424ad385ded79f1e868>:0 at MatterHackers.Agg.UI.WinformsSystemWindow.Show () [0x000f8] in <712ffdb4c0144e8c88c0ce33a0b20977>:0 at MatterHackers.Agg.UI.WinformsSystemWindow.ShowSystemWindow (MatterHackers.Agg.UI.SystemWindow systemWindow) [0x00060] in <712ffdb4c0144e8c88c0ce33a0b20977>:0 at MatterHackers.Agg.UI.SingleWindowProvider.ShowSystemWindow (MatterHackers.Agg.UI.SystemWindow systemWindow) [0x00373] in <49bb6fd6740f4762a381356153fe2e02>:0 at MatterHackers.MatterControl.WinformsSingleWindowProvider.ShowSystemWindow (MatterHackers.Agg.UI.SystemWindow systemWindow) [0x00031] in <16b4831ddba24ef8b2ca5ca9a43af3cd>:0 at MatterHackers.Agg.UI.SystemWindow.ShowAsSystemWindow () [0x0002b] in <a5c2db3666d84398b1090e2f2dfee474>:0 at MatterHackers.MatterControl.Program.Main (System.String[] args) [0x0037f] in <e58f04b6857344df9781155f8ee2c0c8>:0

[theofficialgman]

seems like this workaround worked for me: https://github.com/MatterHackers/MatterControl/issues/4790#issuecomment-782700811

[theofficialgman]

I did get this working in the end, I can’t remember exactly how, but I remember being massively disappointed to discover you then cannot export the models as a STL from the Linux version, it just simply does not work.

@ashleycawley I guess I have good news for you then. I’ve exported STLs from the linux version (latest) and it works just fine.