ArcMain IOMODULE error "DataConnector will not be able to determine the RECORD length." - topic by m1b

Hi, I have a module written in C, compiled as a shard object, passed to ArcMain via IOMODULE. It runs fine in a 32 bit environment with 32 bit arcmain, but when I run it with the 64 bit arcmain on a 64 bit environment, compiled specifically with 64 bit switches, it gives me this error:  

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