Pigmeo was a compiler and framework for writing microcontroller firmware in C# and other .NET languages, developed by Adrián Bulnes (Urriellu) between 2007 and 2010. This is a frozen, read-only archive of the project’s website, pigmeo.org; nothing here is maintained. Source code: github.com/Urriellu/pigmeo · Original capture: Wayback Machine · urriellu.net

FE0005

From Pigmeo - .NET/Mono/CLI (C#, VB.NET, C++/CLI, Nemerle...) for microcontrollers (PIC, dsPIC, AVR...)

Unable to find a field definition within any of the referenced assemblies

Your application uses a variable defined in an unknown place. Somewhere in your application there is a variable being loaded or written to, but Pigmeo Compiler wasn't able to find the original definition of that variable.

It seems like a bug in a compiler, it may be a bug in Pigmeo Compiler but could also be a bug in the compiler of your language (C# compiler, VB.NET compiler...), but we cannot tell which one.