Some days ago, I sent the following message, but it did not seem to arrive for some reason. So, another try, sorry if anyone gets this twice...

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internal error: duplicate constructor

I'm still on vacation, therefore only a short answer. The message is produced by the RTS, but is harmless. You can simply comment it out in one of the files in the rts directory (don't have the sources handy, but you can easily grep for it). This has already been done in the current alpha versions.

Frank