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Required packages for the installation are listed in the download page. You can find the documentation in the page corresponding to each WComp release. Here are all the versions of WComp which are available on this website. You can find all the details for installing, requirements and documentation for each release.
As on Linux platform, WComp needs Mono to execute C# code. Current Raspberry Pi distribustion are compiled for ARM with support for “hard float” which means that float computation are done directly by the processor and not by a soft evaluation.
But for the moment, Mono has a known bug on "hard float" version. So we need to use a “soft float” distribution which is not available anymore on Raspberry Pi web site.