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Hi, given two modules, mod and mod', where mod defines a symbol "thisname" to 99. Now mod1' uses mod and renames "thisname" to "thatname1". In other words, we have two obarrays, one for mod, containing the symbol "thisname", one for mod', containing the symbol "thatname1", both refering to (the location of) 99. Imagine we have mod2' that does the same as mod1 (renames thisname to thatname2) and we create a module mod12'' that uses both mod2' and mod1'. In this module, when we (set! thatname1 12), thatname2 now has also the value 12. This seams logically but it isn't. Does anybody know how this problem is handled in other module systems? I think in the case of repeated inheritance it is better to copy the value to a new location. Yet another problem, is it always possible to detect repeated inheritance? Or should the value always be copied to a new location? Jost