Failure with no error on CentOS with mono

[GoogleCodeExporter]

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What steps will reproduce the problem?
1. From the shell run `mono 
../cs/Packages/Google.ProtocolBuffers/tools/ProtoGen.exe 
--protoc_dir=/usr/local/bin/ ./subdir/simple_types.proto`

What is the expected output? What do you see instead?
Current output is nothing, I'm expecting either a cs file or an error.

What version of the product are you using? On what operating system?
2.4.1.473
CentOS release 6.2

Please provide any additional information below.
Work around provided at http://stackoverflow.com/a/14620272/337065

Original issue reported on code.google.com by [email protected] on 31 Jan 2013 at 7:38