Hi, I am getting an "undefined reference" error listed below when I try to build my program. I am able to successfully compile and link a trivial "Hello World" program, but not my application code. I tried 3 different versions of ghc (5.04.3, 6.0 and 6.0.1) on my redhat-9 linux pc. The gcc compiler is at version 3.2.2 (gcc (GCC) 3.2.2 20030222 (Red Hat Linux 3.2.2-5)). I even tried the ghc 6.0.1 compiler built on my own pc. The result is the same. Error: -------------------- AsnParser.o(.text+0x21139): In function `r2CD0_entry': : undefined reference to `DataziTuple_Z73T_con_info' collect2: ld returned 1 exit status -------------------- Any suggestions as to what may be causing this and how I can get rid of it. To me, it looks like a code-generation bug on ghc's side. Thanks, A.P. Rao __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com