Dear Yhc Core users, I've pushed changes to Core/Convert.hs, this is the code that converts nhc98 PosLambda into Yhc Core. This was in order to get the transformation to preserve how the internal Id data should be mapped to the names in Yhc Core. This is needed to convert the Yhc bytecode backend to generate from Yhc Core. The Core/Convert.hs code has more or less been rewritten from scratch, since in the end I decided it needed to be made monadic to reasonably accommodate the changes. I've checked the output from the process against the old process (on the whole of Prelude.hs) and the only thing that appears to have changed is how v_fail expressions are given unique numbers. Previously there were given a unique number per function, now they are given a unique number per module. I suspect, if anything, this should make people's lives easier. If however, you suddenly start finding that your core is not of the format you were expecting then please let me know. Thanks Tom