# Crontab Issues **URL:** \ **Category:** IronRuby\ **Created:** [December 5, 2011, 4:28pm UTC](https://www.ruby-forum.com/t/crontab-issues/214551 "2011-12-05T16:28:43Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dubstep](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/cdc98d/32.png) [@dubstep](https://www.ruby-forum.com/u/dubstep)\ **Post date:** [December 5, 2011, 4:28pm UTC](https://www.ruby-forum.com/t/crontab-issues/214551/1 "2011-12-05T16:28:43Z")
I’m not entirely sure if this is an IronRuby or a Mono issue, but here goes! I have a test suite that we’re running on my Ubuntu server that works fine when I SSH in and run it manually, but when it tries to run from a cron job I get the following exceptions: * * * WARNING: The runtime version supported by this application is unavailable. Using default runtime: v1.1.4322 \*\* (/home/rob/code/ironlangs/bin/ Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.Diagnostics.CodeAnalysis.SuppressMessageAttribute could not be loaded, used in Microsoft.Scripting \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for Microsoft.Scripting.PlatformAdaptationLayer —\> System.TypeLoadException: Could not load type ‘System.OperatingSystem’ from assembly ‘mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’. at Microsoft.Scripting.PlatformAdaptationLayer…cctor () [0x00000] in :0 — End of inner exception stack trace — at IronRuby.Hosting.RubyConsoleHost…ctor () [0x00000] in :0 at Host…ctor () [0x00000] in :0 at Host.Main (System.String[] args) [0x00000] in :0 * * * Does anybody know why this might happen? Thanks, Rob ---
**Author:** ![robtotheb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/db5fbb/32.png) [@robtotheb](https://www.ruby-forum.com/u/robtotheb)\ **Post date:** [December 5, 2011, 11:15pm UTC](https://www.ruby-forum.com/t/crontab-issues/214551/2 "2011-12-05T23:15:01Z")
The error looks to be with running Mono under cron WARNING: The runtime version supported by this application is unavailable. Using default runtime: v1.1.4322 That’s indicating mono is loading it’s version of the .NET 1.1 framework (which dates to 2003), instead of the .NET 4.0 framework (2010), which is what is supported. As to why mono under cron isn’t supporting .NET 4, I’m unsure. I’d suspect something to do with your PATH or other environment variables that differ when run under your local user account vs cron. From: Rob B.ton [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) To: removed\_email\_address@domain.invalid Date: 06/12/2011 04:28 a.m. Subject: [Ironruby-core] Crontab Issues Sent by: removed\_email\_address@domain.invalid I’m not entirely sure if this is an IronRuby or a Mono issue, but here goes! I have a test suite that we’re running on my Ubuntu server that works fine when I SSH in and run it manually, but when it tries to run from a cron job I get the following exceptions: * * * WARNING: The runtime version supported by this application is unavailable. Using default runtime: v1.1.4322 \*\* (/home/rob/code/ironlangs/bin/ Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.Diagnostics.CodeAnalysis.SuppressMessageAttribute could not be loaded, used in Microsoft.Scripting \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Missing method .ctor in assembly /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll, type System.Diagnostics.CodeAnalysis.SuppressMessageAttribute \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: Can’t find custom attr constructor image: /home/rob/code/ironlangs/bin/Release/Microsoft.Scripting.dll mtoken: 0x0a00008c \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 \*\* (/home/rob/code/ironlangs/bin/Release/ir.exe:4798): WARNING \*\*: The class System.OperatingSystem could not be loaded, used in mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Unhandled Exception: System.TypeInitializationException: An exception was thrown by the type initializer for Microsoft.Scripting.PlatformAdaptationLayer —\> System.TypeLoadException: Could not load type ‘System.OperatingSystem’ from assembly ‘mscorlib, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’. at Microsoft.Scripting.PlatformAdaptationLayer…cctor () [0x00000] in :0 — End of inner exception stack trace — at IronRuby.Hosting.RubyConsoleHost…ctor () [0x00000] in :0 at Host…ctor () [0x00000] in :0 at Host.Main (System.String[] args) [0x00000] in :0 * * * Does anybody know why this might happen? Thanks, Rob ---
**Author:** ![robtotheb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/db5fbb/32.png) [@robtotheb](https://www.ruby-forum.com/u/robtotheb)\ **Post date:** [December 6, 2011, 5:17pm UTC](https://www.ruby-forum.com/t/crontab-issues/214551/3 "2011-12-06T17:17:03Z")
Yep, it was a PATH issue. Seems like cron has an extremely pared down PATH compared to regular users! Thanks!